Hope you have been reading what people are posting or you just make conclusion yourself that they are choosing dice and used it to advertise a dice gambling site. According to what I saw after reading what people posted till this fourth page, the games chosen are Blackjack, Roulette, Baccarat, Slot games and dice.
When I read his reply I also wondered how he came to this conclusion! I re-read most of the previous replies and it's obvious that dice isn't the most suggested game.
If you check his other posts, you will notice that he always make sure to mention this "dicebot".
Besides, why do you care about what other gamblers prefer to play? Just play whatever game you like and enjoy your time.