As in, pay isn't the problem. Your feature requests/bug reports/whatever would not be handled any quicker if you tried to give us money for it (which people have tried to do).
I repeat, it's a 3-weekends-a-year spare-time project. I'm OK spending that amount of time on it, because sometimes I feel like doing so. No realistic amount of money is going to make me want to spend more than that, though. And sometimes it doesn't happen for other reasons.