My experience there hasn't been perfect but so far it the owner has been trying to help me as much as he can. The cell amount going down is a game mechanic that also exists in agar.io, it tells you in the help document I am pretty sure so I don't think you can say that's a scam based on that. I don't think you can really make a game like this provably fair since it's a game of skill.
Agar.io your blob doesn't vanish immediately. Depositing and losing the entire balance within 30 seconds (when you are far and away the largest blob) is a scam. He deletes every comment Ive made in his thread and accuses me of defamation instead of addressing it. He's a scammer.