Yep, it's definitely the artist's fault that you couldn't pony up the extra $10 for their services.

'Choosing beggars,' for those who may be unfamiliar, is the term used to describe someone who is in no position to make demands but does so anyway. You've probably heard the saying "beggars can't be choosers," but these folks would beg (no pun intended) to differ. These are the kinds of people who don't care who baked the cake, long as they get to eat all of it - for free.