Maybe the scam part is about triplemining misleading people into thinking they'll be able to make three times more than at other pools. For someone running an average MH/s mining rig, this would mean that:

Σ(Referred Members's Income * 0.01) = Miners's Income * 0.99 * 3

For a Miner's income of 0.050:

Σ(Referred Member's Income * 0.01) = .050  * 0.99 * 3 = 0.1485
Σ(Referred Member's Income) * Σ(0.01) = 0.1485
Σ(Referred Member's Income) * 0.01 = 0.1485
Σ(Referred Member's Income) = 14.85

14.85/50 = .297 -> 30% of the reward is taken by that single pool, so a maximum of three people can get triple rewards off off 0.50 income in that round.