>You will find a lot of people who will tell you they win at these things. They don't. How do I know this? Because if you win consistently, they kick you off.

This is only true in some cases and entirely depends on your form of gambling. Draftkings and Fanduel both run "daily fantasy" and sportbooks, and they are quite different. If you win consistently enough on the sportsbook, then you are taking money from the house, and they will ban you. The "daily fantasy" gambling on the other hand, works on a paramutual basis where they take their profits off the top. For example they will take 20% of the total prize pool regardless of who ends up winning or losing. Much like the track when it comes to horse racing, they don't care who wins or loses because they are getting the same % either way, and the more volume there is the more money they make.