much worse would be they cancel you at the check-in, "sorry, overbooked, have a nice day sir", and because there was "no costs" involved, you can just go home.

much worse would be they cancel you at the check-in, "sorry, overbooked, have a nice day sir", and because there was "no costs" involved, you can just go home. Hotel and car and etc that you booked for you in US and Canada, it would be gone, no need for compensation. Actually, probably they will have a clause saying that "the booking confirmation is bound to the check-in". That's even written in the text: "The advantages of a PAYF model for corporate travel managers, as BTN Europe previously reported, include not having to chase refunds or pay a TMC to manage this process. There’s also a reduced risk of losing money to airline bankruptcies."