The fact is most poker bots are not great at poker. Yes, they're winning players, but just barely. A bot's real value comes from the volume of poker it can play. But that volume can easily go unnoticed.

Yes and many people do. It's risky though because you can also lose money too. Many big poker sites these days have anti-bot detection software but they're not particularly effective. The best way to find bots is when many different players flag a player that they think is a bot.

The best-selling video game of all time goes to the timeless classic known as Tetris. IGN says 520 million copies of Tetris have been sold, citing data from The Tetris Company.

Minecraft. Minecraft is the best-selling video game in history, with over 238 million copies sold and nearly 140 million monthly active players. A game of blocks and limitless creativity, Minecraft, developed and published by Mojang, has become a phenomenon since it was initially released in 2011.