I don't know anything about trading bots, but this looks pretty fishy to me and it does indeed look as though he's a scammer.  I'll support the flag in lieu of giving this guy a neg, which he already has a bunch of.

A promise of guaranteed returns is the hallmark of a Ponzi or some other scam, and since this isn't a Ponzi I'm just going to assume it's a lie made up to sell his bot.  Markets don't work this way, by the way.  If you had something (a bot) that could guarantee you profits, the more you distributed said bot, the less effective it would be--at least in theory.  He'd be stupid to sell a successful method of making money in the crypto markets.