Is yahoo chat room bots planted by Yahoo to gain more money? if not, how do they byp the "secert check"?

I've been visitng Yahoo chat rooms recently and found that there's LOTS of bots in the rooms. Although Yahoo! introduced the "secret" phrase... how do these bots by p this security feature? How come the rooms still seem to be flooded with these bots? Is it Yahoo regulatiing the system so they can only allow "yahoo bots" into the system therefore creating more money for Yahoo? whats your thoughts if any...