Allowing a plugin to be a premium add-on

Is it possible to add a plugin as a premium add-on to any pro-sites level?

For example, I might want to offer the marketplace plugin as a premium add-on for either a flat price or an additional monthly charge. But I'd like to make it available to any of the levels without them having to upgrade to a specific level.

EDIT -- I found my answer from another post. This topic can be deleted/closed.