Indeed, it won't be sufficient but at least one can show aknowledgment so that people won't vote at random. Every single upvote is an invstement. An exchange of money under a legally bounted entity.

I am even thinking to post only my own material. There could be a separe upload boc for each picture where one has to include a creative commons approval.

Things is we are bound to this thing. Each and every upvote demonstrates responsibility and monetary exchange.