It doesn't happen too often, but when it does, it sucks.

Basically what happens is: An artist accepts a request, spends time and effort into it and in the end it's all wasted because the request had been canceled.
Im not talking about requests beeing closed because someone else was faster or better, but rather about requests beeing closed for stupid reasons like "changed my mind" or "dont want/need it any more".

A new rule could help prevent those situations, something like a fee that has to be paid, a percentage of the actual payout or maybe something else...

Maybe not everyone can relate to this issue, but admit that this is completely unfair for the artists of the community.