These pictures all came from Epstein's estate. I think you have hit the nail on the head, though. He would hold parties on his private island, have his own photographers there taking pictures, and then hold the pictures in case they became useful collateral at some point.
It worked well for Epstein, until it didn't.

It probably will work well for Republicans, because those same 40-45% of people have been conditioned by their media to repeatedly vote against their interests. This won't change their vote at all.