On: Is anyone using bots to make their social site look busy? If so, how do the bots work? Are users told that they may encounter bots?

[amichail]

From the paper:

"Having pre-recorded game play is especially useful when the game is still gaining popularity. When there are few players, only a single person will usually be playing the game at a time."

So the ESP Game does use bots to make the site look busy.