Knowing how the Gods stand for strong ethics and justice and how much they care about The Joy of Satan, and us all here. Money being donated that was obtained in an unethical way would likely upset them.
Straightening this out and getting money legally and ethically is the key here.
Unethical is one thing, if it gets into illegal territory it's another. Neither is good, but enough illegal funds flowing into the JoS will only bring trouble, and knowing the enemy they won't go after the perpetrator, but likely try to shut down the JoS using that as a pretext.
The Gods teach ethics for a reason. Exploiting someone might bring you temporary material gain, but the forces that action sets up on the astral will only bring your downfall later on.