The game is popular for several reasons. First of all, it is rather easy to learn as you only have to get familiar with the betting options, while the dice roll concept is familiar to everyone. The second main reason is that it is rather easy for online casinos to offer Sic Bo. It does not necessarily need a 'dealer'. Everything may be done by computer. To diversify their game lineup, the casinos started offering Sic Bo, and people liked the game.