Requires activation and invite only. NO RELIST (but sell similar will probably work)
And lol I did get the e-mail, but when I click the "Activate" buttom it says it's invite only and I didn't qualify (lolwut), guess I'll have to try after 9pm PST to see if it works.. 
Link - http://pages.ebay.ca/promo/2015/0408/SellAuction.html
Terms & Conditions (read carefully!)
Final value and optional upgrade fees apply. No guarantee is made that any item will sell at a particular price, or at all.
Please note: Invited sellers must activate the Promotion by selecting "Activate offer" in the invitation email or on the Promotion landing page. Items listed prior to a seller activating the Promotion will not be eligible for the Promotional Rate.
What is the promotion?
Sellers who activate the offer and then create a listing in the auction-style format or auction-style with Buy It Now format, pursuant to the terms and conditions set forth herein ("Qualifying Listing"), will pay no insertion fee per newly listed item (relisted items not included) and no additional fee for adding 10-day Duration to these listings ("Promotion") for up to 500 listings during the Promotion Period (as defined below). All existing selling limits on your account (as well as category and item limits) still apply, and may prevent you from creating the maximum number of listings in this Promotion. The Promotion is in addition to the monthly insertion fee promotion and/or any other insertion fees that are included as part of your Store subscription.
5-, 7-, and 10-day listing durations are included in this Promotion. The Promotion does not apply to relisted items, final value fees, or optional upgrade fees. Final value fees will be applied to the total amount of the sale, including the cost of the item, shipping, and any other fees a seller may charge-excluding any sales tax. Fees for optional listing upgrades (such as reserve price, Gallery Plus, listing in 2 categories, etc.) still apply. For listing in 2 categories, you will be charged at standard rates for the second category. Please note: Not all upgrades are available in all listing flows.
Who's eligible?
This Promotion is available to invited sellers who: (i) received an email and/or message in My eBay; (ii) activated the promotion from the invitation email or on the Promotion landing page; and (iii) meet eBay's minimum seller performance standards. Please sign in to My eBay and view your Seller Dashboard to verify whether your account is currently meeting the standards. If you have received fewer than 5 detailed seller ratings from buyers, this information will not appear in My eBay; however, you will receive email notification if your account falls below the minimum performance standards.
When is it?
This Promotion will begin on Wednesday, April 8, 2015, at 00:00:01 PT (12:00AM plus one second), and will end on Sunday, April 12, 2015, at 23:59:59 PT (11:59PM plus 59 seconds), for listings on www.ebay.com. For listings on www.ebay.ca, the Promotion will begin on Wednesday, April 8, 2015, at 00:00:01 ET (12:00AM plus one second), and will end on Sunday, April 12, 2015, at 23:59:59 ET (11:59PM plus 59 seconds)(the “Promotion Period”).
How do I activate the Promotion?
Sellers that have been invited to participate will automatically receive the Promotion after they activate the Promotion from the invitation email or the Promotion landing page, and then create Qualifying Listings on the US site at www.ebay.com, eBay Motors at www.ebay.com/motors (Parts & Accessories and Automotive Tools & Supplies only), or eBay Canada at www.ebay.ca through the Sell Your Item form, eBay Seller Tools, eBay Mobile applications, and most third-party tools. Any listings created prior to the time of activation will not be eligible for the Promotion. For sellers listing with any tool other than the latest version of the Sell Your Item form (SYI 3.0), the Promotional Rate will not be shown during the listing process. Instead, the discount will be reflected in the "View Account Status" section in My eBay, as well as in your next invoice.
Restrictions & Exclusions.
- The Promotion excludes the following: 1-day and 3-day listing durations, relisted items, and items listed in the fixed price format.
- The following categories are excluded: eBay Motors Passenger Vehicles, Motorcycles, Boats, Power Sports, Other Vehicles, Motors Local Market, Real Estate, Classified Ad listings, Heavy Equipment, Concession Trailers & Carts, Imaging & Aesthetics Equipment, and Commercial Printing Presses.
- All Qualifying Listings must comply with all applicable eBay policies, including eBay's Duplicate Listing policy that allows for the removal of duplicate fixed price listings.
- The Promotion excludes listings created prior to a seller activating the offer or with a start date prior to Wednesday, April 8, 2015 (including those listings revised during the Promotion Period). Additionally, the Promotion excludes listings that are created during the Promotion Period, but scheduled to start after the Promotion Period. Listings created prior to Wednesday, April 8, 2015, but after a seller activates the Promotion, which are scheduled to start during the Promotion Period, are eligible for the Promotion.
Hopefully I'll get this on at least one of my id's.
It would be good timing, all my listings ended this afternoon.
There is a screw up after all. I was able to activate the promo on the .com USA site, but tried listing on .ca and got charged. It appears that the activation works on .com but not .ca. Will be able to test more once 3 am EST kicks in on the .com site.
Same here. I tried to "sell similar" 100 ended auction listings and on the bulk edit page I'm given a listing fee quote. Obviously not gonna hit "list" and get charged $70 lol... 
Hmmmmmm
So after midnight I checked My eBay on two of my main id's to see if I got the promotion, nothing showing.
I clicked the .com link posted earlier and was told I have accepted the offer.
I then went to the .ca link and tried that one, it told me I had already accepted the offer.
Back to My eBay on both .ca and .com and still nothing showing on both id's.
I haven't tried to list anything, I'll wait until 3:00 eastern and look again
Looks like it COULD be working now. I just clicked sell similar for 100 listings and it quoted $0 fees. I haven't actually tried listing yet.
I also see the following in my summary page.
Zero insertion fees on 500 auction-style listings Pay no insertion fees on up to 500 auction-style listings. Excludes relisted items. Learn MoreAvailable at cafr.ebay.ca,ebay.ca | 08/04/15 00:00:00 EDT | 12/04/15 23:59:59 EDT | 0 | 500 | Active  |
