What you should do instead is just release a closed source miner software for your +50% speed up XMR mining and just charge a 1-2% fee, since your miner will be the fastest you will get the most miners and hence more revenue.

People are suspicious because you are a new user on here and people don't want to run closed source executable files in case you try and steal private keys from their computers. I guess some people can only run it on their dedicated miner rigs which got nothing but miner software and drivers but some people would still be cautious. Lots of scams going around.

Maybe find someone to do the escrow first and that would provide assurance of some sort that they aren't going to get scammed. However you should just release a closed source miner because it would make more sense.