If you list on eBay.com and specify eBay.ca as your first option as a second country, your listings show up in general search on both eBay.com and eBay.ca and not as international search
If you list on eBay.ca and specify eBay.com as your first option as a second country, your listings show up in general search on both eBay.com and eBay.ca and not as international search
Your exposure should be the same... However, Best Match treats the same search results differently on .com than on .ca Best Match appears to be more aggressive on eBay.com
As long as you list in US$ whether on .com or .ca then end results should be the same.
If you send listings to eBay using Turbolister... shipping for .ca is Canada Post while for .com it is USPS.
I do suspect that the new regulations apply to eBay.com... If you have some but not all listings on .com... they may consider that the new regulations apply to you, even though you have listed the media listings on eBay.ca
Now and in the future, it may become more and more advantageous for Canadian sellers to list on eBay.ca as opposed to eBay.com
And in the future it may be advantageous for some US sellers to list on eBay.ca, mainly because of the difference in regulations... especially if they live near the Canada-US border.
Then eBay may put caps on listings on eBay.ca I can live with Canada Post caps... but not USPS caps...
Que sera, sera.......