Don't know if I am the first to think or suggest it..
But Rack Extension forum badges.. just like the ones for Reason, Reason essentials, Reason Adapted, Reload, ReCycle and ReFills.
Rack extensions is a propellerhead product right? Just as ReFills are, people who purchase ReFills get a forum badge for it, so people who buy Rack Extensions should too.
It's not entirely important I know.. but its only a small change that I think would just make things look nicer and keep with the flow of things.
(and maybe I am kinda sad that my reason badge up there is all alone)