That would be useless currently joining one of them, then. PrimeDice is one of the most trustworthy ones, and those have a cap, and are 'fresh'.
Yeah, Fastbluff is really same to Primedice, so i don't think there's a good reason to choose them over PD. But Lunamine is paying weekly so that's attracting and a plus value for some users.
and they're paying 0.0003btc per post for members while PD is paying 0.0004, other rates are the same..