Eddie from the DigitalOcean DevRel team here. We're looking to partner with all the folks to help support and deliver open source and vendor software easily. Here to answer what I can.
Do you have or are you planning to have a centralized way for these apps to perform and restore backups or is that handled by each partner themselves?
0: https://www.digitalocean.com/docs/images/backups/overview/
TLDR: Vendors can add licenses now. Billing coming later.