I'd have to agree - while it is possible that someone could have reason to sell their system/signals, the vast majority of vendors seem to be borderline scammers. I won't name anyone, but I think there are people out there charging people to learn to trade who are the real deal. On the other hand, a lot of the systems being peddled claim to be fully automated, low risk, massively compounding, with minimal variance - in this case, there isn't much incentive to sell.
Moral of the story is to assume these people are full of it unless proven otherwise over a decent sample size (real time, not potentially curve-fitted or carefully selected backtests).
