Here's a close-to-10-year backtest on Megadroid. It takes a $1000 account into $1 million in 5-6 years.
Of course, once it hits $1 million, the lot sizes exceed 100, so in reality you wouldn't be getting your 16 million - but by then I don't think you'd really care too much
That said.... the problem with closed black-box EAs is how do we really know that Megadroid hasn't been backtested and made to fit a ten year period?
In any case, it's probably worth risking $1000 for the chance to get $1 million