The truth is, yes  casinos can control a slot machine or rig it only to give players small wins. Some casinos work with developers to create exclusive games. This gives them even more access to a game's code and RNG.

Modern gaming machines use computer technology to operate their functions. Slot machine outcomes are determined unsing a Random Number Generator (RNG) which is a mathematically-based program that selects groups of numbers to determine which symbols are selected to produce a winning or losing outcome.

At Google Play, FanDuel Sportsbook is rated 4.7 out of 5, while the DraftKings app has a score of 4.7. FanDuel has roughly 110,000 ratings, while DraftKings has just under 50,000 on Google Play. As far as user experience, FanDuel is a market leader in this area and it's easy to see why.