Wow. You are a flippin genius! This is soooo cool. You are so cool. In fact....hang on, I'm looking it up....yup. It's confirmed. Your picture is in the dictionary next to "cool".

Without the active key, they won't be able to enter any paid tournaments, which will be a point of frustration, and I imagine at the end of the year at least some of them will be keen to start their own accounts

I'd say that'll happen a lot quicker than 12 months, mate.