Better still to develop his time to learn and make more research before trying to go into such services, I believe those who launches such mixing services has took more years to make findings on how they could executes their plans.
But sad news for OP did he read the message posted by theymos about mixers? If yes then I don't think here is the best place to further talks about his mixing service since from 1 January 2024 no mixers discussion or even post link that directly link to mixing website and whatsoever is allowed here anymore.