Of course bitz can't be compared with those newly site that are not knowing the right strategy to follow. One thing about bitz is that they are unique in everything they are doing, and their marketing strategy is something else here and this would definitely bring enough engagement to the community and the forum at large.
Well, they are not unique in "everything", but they really have a good marketing strategy... they reward engagement with Sats, and they have interesting promotions. Reward Center is interesting, they have nice promotions on X, email promos... I guess they need some nice Bitcointalk promo as well...
All that can be enough for stacking some Sats... Since they have "Satoshi's Weekly Ultra Freeroll", with some luck, it's possible to win some nice spots & prizes even with lower amounts.
Good luck to all players.