Well that’s the problem right there. Thanks for your generosity, et cetera, et cetera, but frankly, this kind of approach tends to scare most people off. I’d much rather have CC0 or an attribution-based CC license where I can pick a font at my leisure, credit their author and immediately forget about the entire thing, than have someone personally collecting evidence of use and later contacting me in regard to one of the dozens fonts used in my projects. It’s either free or it isn’t.