I check " Show unread posts since last visit." and 80% there is advertising some gambling or bets services , does it so popular here ?
For me, the reason is because bitcointalk is home of high rollers. This recent casinos who advertise or running signature campaigns here is trying their luck to got some high roller to play on their platform. They know this forum is where serious players gather, so it's the best place to attract people who like to bet big.
These posts would probably decrease if bitcointalk also bans the signature campaigns of online casinos, similar to what happened with the signature campaigns for bitcoin mixers.
Yeah... Like Sportsbet, BC.game and Rollbit do sponsorships with some competition pools on this forum those who join are serious gamblers... They also run signature campaigns means the casino knows that bitcointalk more users who like gambling so their target to advertise on the forum is longer because a lot of audience from here.