Our business model is pretty straight forward and transparent. Of the rewards being rewarded to the Masternodes we take:
35% fees from custodial funds
20% fees from non-custodial masternode shares.
We have no signup costs, and no costs related to withdrawals (apart from the transaction fee to the network, which is marginal).
Furthermore, it is possible to track all the masternodes in our pool, such that you can rest assure that your rewards are correct.