[Feature]: Add an option for packages to have a "requires payment" setting

[SimonCropp]

NuGet Product(s) Involved

Package management UI and nuget gallery

The Elevator Pitch

This setting would be a key to a known list of "payed license" providers. For example GitHub, OpenCollective, Patreon etc. Each of these providers would implement a convention based web API. When someone adds or updates the package, their id (along with package name and version) is validated against the providers API. If it fails the API returns a url that can be shown to the user so they can purchase a license or otherwise resolve the issue.

Package restore would bypass this process.

[webprofusion-chrisc]

Here's an API I just made up, by way of discussion. It has one /license endpoint you post to and http 200 means you are licensed: https://webprofusion.stoplight.io/docs/pay-package

[JonDouglas]

Thanks for the feature request! We'll continue to keep a close eye as more comments, reactions, and discussion continues for this issue. For reference, we use 👍 in our yearly planning exercises to gauge what highly requested features to work on.

If there is enough interest and the community would like to move forward with a RFC (request for comments), please feel free to do so through https://github.com/NuGet/Home/tree/dev/meta#how-do-i-create-a-proposal so our team & the community can formally review it and provide feedback on the structured thinking through the problem & proposed solution.

Thanks again!