[namityadav]

I was thinking the same thing. However, if this company had infected those thousands of machines, and was presumably mining continuously, and it still was able to make only few thousand dollars, then I guess you'll not be able to get any meaningful revenue by only mining while the game was active.

But I think if you offer a game for free to users with the understanding that their computer will be used to mine bitcoins continuously (but never exceeding, say, 5% CPU), a lot of users will still take you up on the offer. The power of free! I'm not sure if even that revenue will be meaningful, though.