I personally like to see companies sponsoring maintainers. We’re working to clarify that with the community is the terms have different value propositions & financial implications.
From what I understand, you're not 1:1 giving the money to some maintainer that's chosen but you'll distribute it according to code usage etc, so you won't be a payment provider, but it counts as revenue for you and you give the money to maintainers, right? Are you invoicing or do you go the github route?