There's a lot involved for Renderosity to set up donations. It's not just a matter of cutting a check. It does make more sense to set up a paypal account.
Another way is to upload a product and put her name in for a percentage.
I hope things work out for her but it's not fair to jump on R'osity for something they've tried to do in the past and learned it's not as easy as it seems.

...... Kendra