I am 95% sure that the equihash miners we have are all based on closed source EQM and open source NHEQminer and there was even a warning on release of NHEQminer: https://bitcointalk.org/index.php?topic=1747789.10

If you read through https://forum.z.cash/t/nicehash-eqm-zcash-nvidia-optimized-miner-maxwell-pascal-win-linux-cpu-mining-v1-0-4c-400-sol-s-gtx-1070-stock/8188
and https://forum.z.cash/t/nheqminer-open-source-free-cuda-zec-gtx-1070-400-sol-s-miner-by-nicehash/13542 you will get to the same conclusion as I have.

I don't agree of people ripping off open source and other projects and then stealing from all the users. So stop whining about us being greedy.