Then why do not you do a miner ?
There hasn't been enough incentive to do it. If someone offered a large enough payment, I could write a Linux ZEC miner that is at least 10% faster than Claymore 9.2, and probably have it finished in under 30 days.
You can add a 2% devfee just like Claymore does and make much more than 10BTC.
That's a possibility, but by no means a certainty. ZEC could drop to $10. The majority of ZEC could end up being minded by botnets, or by big farms running private miners.
I've been approached by a number of people asking me to write a private (and possibly public) miner, so it won't be long before I get the right incentive to write it.