Now, I know that probably some people are going to look at something like twitshirt and go "Hey! that's a great idea", and that's ok. It'd just be nice if you could, oh, sign up for this sort of thing out of choice, rather than go out of your way to opt-out.
It's a bit weird to discover that someone could be making money off of something you've done after all.
Really, 50cents isn't really that much compared to $19.50 is it?