Bots are possible and real but, as said above, they aren’t very sophisticated (yet). Building a basic bot that would only play the right starting hands should be very easy (and I guess it would win against bad players at very low stakes), but that is far from Deep Blue.
As for cheating.. It is more than likely 1% of what these people claim. Cheat sellers claim they can see other people’s cards, they can see this, they can see that.. the fact is that hands are processed on the main server so, short of hacking them, knowing someone else’s cards is impossible. The cards aren’t sent to the clients until the showdown is resolved. I’m not in the secret of the Gods, I can’t confirm that 100%, but anyone that ever programmed something will do it that way. Again, short of hacking the main server and knowing the algorythms used to decide the next card, cheating is VERY limited.
EDIT : As for bots colluding.. any software with even minimum collusion detection will raise the red flag on 2 players always on the same tables and always playing at the same time.. IE a table breaking and only having these 2 playing together for hours.