It's not what I would call a zombie game because there are still 10s of thousands of real players daily but that doesn't mean there aren't hundreds of thousands of bots. I know of single players running 10k plus bots. When the game was ramping up last summer, I was talking to people who were forming guilds where the requirements were that everyone in the guild was running at least 10 bots each.

Also, take a look at this. Here's the stats on daily new players. Look at yesterday. Do you think that's word of mouth that got thousands of new people to sign up in a few hours or is that players already here ramping up their bot efforts for whats to come?