This is a great feature, we where using another link system until now, and now we are changing the links to this official way.
Example:
On one of our admin themes www.xenontheme.com we have two links, one for Regular license, and the other for External license. We implemented the new link that you just introduced on the Regular license area, but for the Extended license we don’t know how to use the new link and we are using the old method.
We just wanted to ask @lukemeehan, if we can set the link to buy Extended license instead of Regular license with this official method now? Have you thought about it?