I've seen one of the binary sites manipulate prices where the graphics are slowed down or accelerate to make the player lose, me and some of my friends tried it for real.
Which binary sites are you talking about? Asking because I played on several such sites and will probably avoid them in the future based on your information.
the withdrawal fee is today at $ 12.2.
Seriously? That is way too high. ETH fee is close to $22. In this case, Rollbit needs to offer alternate cryptocurrencies like LTC etc in order to solve this issue.