suprnova.cc used to the biggest ZCash pool. What happened to it so it has to offer no fee to attract new users?
People started mining with Claymore and are using anonymous (wallet addresses) for mining - many are not aware that it works on suprnova too unfortunately.. You can just point your rig the exact same way with wallet address to suprnova as well ...
ZecMiner64.exe -zpool zec.suprnova.cc:2142 -zwal Yt1uaa4yJuwDvErGbzVERx69zt9qsaZZpMYG -zpsw d=256
Works for example and also sets a static diff of 256 for your worker..