Let's just simplify it. 100% of binary option websites are scams. In the long-run you can't expect to overcome the middle man fees they take out of every transaction. It's pure luck / gambling. If you're looking for simple up/down type of binary option plays, what's wrong with using call and put spreads at the money? No middle man, transaction fees are low. If you really are looking for more simplistic trading, then simulate binary options yourself without the middle man.
I demo'd 1, they returned 66% on a win, so you need 66% win rate just to break even, I was around 60% profitable, so account was still slipping away. 100% pay out, double or nothing I'd of played it, till they dropped the profit/odds ofcourse. A mate did well on WilliamHill at first, then the pay out kept reducing till it wasn't profitable, obviously they want you to think it's you and keep throwing money at it.