Copious amounts of magic.
I could go on about speed of execution, transparency, etc. hype myself up and do the marketing thing, but ya know what...
You are exactly right, I am just another guy trying to pool the communities resources.
I am providing a service, some members of the community may find value in it.
I am willing to take on the responsibility of pooling the resources of a group and watching over the operation of the mining setup.
... and while "buy equipment for me" is no where near correct, yes - I will gain from it. 20%.