The ones I've met have been friends, friends of friends, or co-workers of friends. It takes me a lot longer to trust the value a business person will add than

The ones I've met have been friends, friends of friends, or co-workers of friends. It takes me a lot longer to trust the value a business person will add than a developer, but if someone you know recommends them and can attest they were the top sales person in their startup for instance, then I'm more interested in working with them.