Yeah but look at how few Yankees fans there were In Toronto last weekend. Perfect weather, a cheap dollar and Western NY is 1.5-2 hour drive away yet there was maybe less than 2K NY fans in the building. And regular season you'd have 5-8K fans at minimum.
There's always tickets available with the secondary market in this day and age so that's never really a deterrent for anyone who wants to go to the game. I think you guys will be quite disappointed if you are expecting 20% of the fans to be Jays fans.