Yeah, I get the feeling. u.u Honestly, I'm pretty horrible with usernames. there was an account that had this username way back when, but it never logged in and it was really just a waste. I don't plan on having my username changed anyway, as I think I finally found something that would stick with me.
Also, I'm pretty sure that there are other ways to donate to PC, but I've only really used paypal to do such things, so I wouldn't know if they were any better or not. ;_;