There was a promotion a few weeks ago:
http://mail.ebay.ca/r/mail/34be0II3839c6II1aa9566cc60II1
For the last few years eBay has offered one or two "invitational" promotions every month, sometimes for "auction style" listings, sometimes for "fixed price (BIN)" listings. Sellers are not "invited" to every promotion.
With the recent changes to the fee schedule, eBay may feel promotions are not as useful as they used to be. With so many listings available on the site, there is little to be gained by eBay or sellers by adding more listings unless more buyers can be attracted.
With the new fee schedule, all sellers are given "free" insertions every month: http://pages.ebay.ca/help/sell/fees.html
In addition listing fees are refunded for "auction style" listings if the item sells and eBay no longer charges the longer duration fee for items listed at auction for 10 days (better change to sell if listed for longer).