Quote Originally Posted by Risvertasashi View Post
Commercial operations, by their nature, are going to be the biggest ones. Simply because money's involved, and when there's a monetary incentive to do something... well, you know how it goes.

As for personal reasons, likely they're people that want to automate some repetitive tasks while chasing dreams of riches. At least, I think that explains the gathering bots. PVP bots... I'm not sure on that one.
Well it's the fastest way to level if it's still offering a stupid amount of EXP. But some people might be trying to inflate their PvP stats to win the prizes.