Pretty much every single time I buy something at 7-11, they ask me if I'm a member. As I clearly look foreign, I can only assume that they have foreign members, otherwise why would they bother to ask?
I use the TrueMoney wallet, so I already get "coins" for 7-11 purchases. With a ridiculously low monthly cap that I've typically maxxed out around the 5th of each month. That doesn't amount to a lot in actual baht and I just cannot be bothered to check if becoming a "member" gives me significantly more benefits.
The owners of CP need the money a lot more than I do, in any case. 555