The developer is still active, but focused on Polyshield, which is a new masternode sharing service that they're building around Polytimos coin. While they're working on it, the value of the coin has dropped a lot, since it seems the marketing effort has to take a backseat. (this has been GREAT for mining)

In the meanwhile, remember it's a fair release and easily mined. And, you get a pretty fair shake on Polyshield if you want to participate in MN sharing (interestingly, there's no MN feature for Polytimos itself). You can apply your POLY to a decent satoshi value in whichever other coin's masternode you want to invest in.

Polyshield is still in Alpha, but you can request early access on their forum:  https://forum.polytimos.net/category/5/polytimos-services