Have you checked out GrowSumo.com? They were YC S15. Luke and Bryn are awesome guys. They got us connected with a handful of influencers that promoted my first startup – www.goodaudience.com. Then their software tracked monthly commissions and payouts.
Thanks sherm8n. Happy to chat to anyone about best practices, but our platforms lets you set commission and make payouts.
You need to mention that they charge $300/month minimum. Their feature set seems pretty low for the high price...