The second bot is a joke (the link to this forum)
The pokerbotter guy nailed it. If someone is trying to sell an algorithm it's because it isn't profitable anymore.
If you spend any real money on a system where he shows you the results from a whopping 13 trades, you deserve what's coming to you.
Don't fear the bots, I'm going to bed soon, but I'll come clean here and say that I do have a working bot that makes real money (not a ton). I barely beat out a miner and am currently assuming nearly the same risk, although difficulty doesn't effect me. Ask me anything you want, but I won't give any details about how my bot makes money, or how it trades... but if you want to know the logistics of making one, my opinion on how it impacts the market, who else is playing around the in the markets, I'd be happy to share. Just not willing to give up the secret sauce.