The number of players in a project does not always indicate the success of that project. I personally don't enjoy playing Hamster Kombat and I feel that I can do more useful things instead of tapping my phone. Despite my feelings, it seems like everyone around me is talking about Hamster Kombat and playing the game. I just hope they are getting some benefit out of it, like at least covering their internet fees.
Considering it's volume, you can say that it's a successful project but of course there will still be problem along the way and not all those players are satisfied with Hamster. If you are thinking about to invest, just keep on doing your research because having that kind of huge community, it can be more risky in your investment. So if you are into games and saw the value of this project, then it's all up to you.
