I don't think Alex Plank has ever resiled from the position that Wrong Planet, and Aspie Affection as well, are part of a privately-owned business enterprise. Certainly whenever someone on WP raises a demand that Alex or the site should do this or that thing, or be more proactive, or act in a way more representative of its membership, or in the so-called "interests of the community," the response has always been "It's Alex's site, and it's his to do with as he sees fit." Does he have a duty of disclosure, in that case, to account for any monies received through voluntary donations? Seems unlikely to me. I'm not a lawyer, however.
Once again it's the classic caveat emptor. It's up to the people making the donations to determine whether or not they are receiving any value in return for their "investment."