Selling the miner to the big boys is effectively giving a pre mine to vested interests, increases the pump and therefore the dump and in the end will damage good faith and liquidity. If these guys are so good at writing code sell the software by subscription per rig so everyone pays the same.
I have tried different models. My latest optimized kernel was the LBRY kernel with a buildt in 3.3% fee. I spendt 100hours to do the job, and just recieved a few BTC for the job. My LBRY #3 kernel is still the fastest on the maxwell cards. (980ti up from 230MHASH to 300MHASH) etc..
I would have earned more flipping burgers at Burger King..
I also recieved and alot of complaints from he other devs. (open source Violation etc. etc.)
My Zcash kernel is around 33% faster than nheqminer v0.2 on the gtx 1060 3gb. and only a few percent faster on the 1070. I didn't spend much time to make it, but I had enough cards to make a decent profit on on the launchdate/weekend, and it is still doing ok.
100 hour is not even a 30 days time(assuming a normal job of 8 hours per day) for a regular job that pay $1000 a month, so "few btc" is correct i guess, what you expected ton of btc for some line of codes?