Never trusted them. Every time I get approached tell them the same thing:
I will give you 35% of the profits you make for me above and beyond all fees and commissions. If you don't make me any money then I don't owe you any fees.
Never had one accept this arrangement.
You didn’t ask the right folks. Try a Hedge Fund. That’s the way that they do business but most do it for 20%.
Also, look into Fisher Investments.
Those will sign you up like pronto.
All of the above is if you’re really determined to invest that way.