Many players don’t realize just how many different bonuses they can find at online casinos. Many online casinos will offer players the chance to increase their bankroll just for bringing their friends over to try the range of games for themselves. While this is certainly one of the lesser-known casino promotions and bonuses out there, it can be one of the most lucrative too. Which bonus are we talking about? The refer a friend bonus, of course. Refer a friend bonuses are rarely included on the promotions pages of online casinos, but that doesn’t mean they don’t exist. They’re extremely simple to take advantage of and can lead to a large number of rewards coming your way.