I don't understand why anyone would still mine using this miner and pool...

Pool fee is 4% I think, Suprnova's for example is 1%. Minimum payment (crucial detail for small-time miners) is extremely high, I don't think the operator acknowledged one request for a 0.001 payout threshold. At Suprnova, you can set your own amounts and withdraw your earnings yourself.

I made more ZEC in less than a day using the Genoil miner v0.5 (GPU only: R9 280x, 1200/1650, 38 sol/s) than in two days using this miner and pool (15 sol/s, GCN 1 card thus Silentarmy not functional, v2 not yet added to this miner).