Having a Prison Team endorsed scoreboard plugin allows us to provide support for those issues with scoreboards. It also allows us to better interact with the other Prison modules and spare third-party developers the integration of Prison 3.

This will not be present in the Initial release. And don't worry, I'll do this one :)

Good idea! A scoreboard API needs to be added to Prison-Core though, perhaps that can be planned for API 31.

A scoreboard API has been created. Documentation can be found here.

Perhaps it would be better to implement Prison 3 into other scoreboards instead of creating our own, because that way, server owners can use a whole menagerie of variables in their scoreboards.

By integrating with MVdWPlaceholderAPI on the Spigot implementation, we can fulfill a lot of user requests for Featherboard while also providing an outlet to the other scoerboards that support it.

I'm closing this issue for now, and opening another one for placeholder API integration.