This message could have been continued in the previous thread titled "Power Seller Discount", but I figured it deserved the attention as a new thread.
I, along with others, seem to be confused regarding to what discounts are being applied to their invoice, so I contacted eBay through their live chat system to get some answers and clarification:
1) Since I am registered with eBay.ca, my Powerseller status is Canadian, thus ONLY my ebay.ca listings are applicable for the perspective Powerseller discount of FVF fees.
2) Since I have been able to achieve TRS status, I enjoy the 20% discount of FVF fees ONLY with my successful ebay.com listings.
3) If you have less than 400 sales in the last 3 months then eBay will look at your 12-months DSR
4) eBay.ca does not offer the latest perks that eBay.com has - such as up to 12 free images in certain categories, enlarged images, etc, etc
Points 1 & 2 are extremely important for those who incorporate the discounts into their business model
I am using all four points to decide whether to list in eBay.ca or eBay.com. It does not appear to be as simple as some have stated in the past. There is a huge difference in one's decision on which site to list their items and even register their membership with.
Since my Powerseller discounts fluctuate from 0% to 20%, I am willing to ignore that incentive and focus on my TRS rewards. I doubt that I could change my status from Canadian Powerseller to an American one to reap the benefits of having a possible total combined discount of 40%. Starting over with a newly registered eBay.com handle is a weak at best option, since one's selling reputation is lost and there is too many hurdles to jump with Paypal/eBay policies.
The simplest solution is to just ignore all this convoluted discount(s) system and just build a model based on no discounts. That way, the monthly treats that eBay gives you will be exactly that - treats. Considering it that way, Point #4 is the deciding factor and I shall only from now on post items on eBay.com
Others might other concerns such as shipping calculators, shipping services, etc. etc., but the majority of my items are sent by lettermail and thus have no concern as to which site is used for listing.
I hope that I have helped clarify some points that might have confused others - and I hope I have not confused others who thought they were thinking clear.