When I first signed on to Tapas I got queries from other web sites asking me to go with them and they'd make me money etc. I reported them and Tapas did their thing.
Nothing new there, nefarious people in publishing is as old as anything.
There are a few warning websites and blogs out there that every writer should have bookmarked. This is one of them. Yes, it says Science Fiction Writers but its good for any writer. The person who runs it also has a blog. I check them out regularly as do several other authors I know.
Write hard, write true.