Absolutely disgusting behavior by Kevin. I'm kinda hoping that it's just incompetence at UpWork that caused this, and not that Kevin actually knows someone at UpWork, but in all cases that's why I stopped freelancing through UpWork and similar, and started building a solid client base which know that I'm always there to help, for the right price of course. Plus I write somewhat technical and topical blog posts about the technologies I work with (mainly video encoding, processing, P2P CDNs, etc.) and that seems to pull clients in easier than it would be using UpWork.