Reddit, Facebook, Youtube, Insta, etc... I have no idea how many up and down votes are cast without financial compensation, but the number of votes cast for financial reasons on social media is certainly miniscule in comparison.

There is demonstrably no need to financially compensate votes on social media, and it is insuperable to claim doing so creates incentive to vote content according to it's merits. The reverse is provably true.

Museum curators aren't paid for curating particular additions to collections, but for creating valuable collections. Where adding particular items to collections are individually compensated, it is obvious that corrupt influences degrade collections. The first example that comes to mind is the Payola scandal.

History is the best teacher.