Quite! Let's have a look at Labs, another microsite:
if the logo design principle were being adhered, shouldn't that also say "Labs" rather than RBY? Also when you click there you get taken back to giffgaff.com and not to the Labs landing page. So at the moment Community is the odd one out.
What about the main site where it talk about the network run by you?
This would require a full branding redesign...
I think "run by you" is generally regarded as giffgaff's strapline and as such can be considered part of the giffgaff logo. I don't suspect anyone would click on it expecting to be directed to the RBY awards.
A massive overhaul to Flarum's core database structure would be required,
Technical restrictions shouldn't get in the way of good, consistent design! 😛
A compromise would be to remove the replace the Community branded logo with the RBY branded logo and have it link to giffgaff.com and replacing the then redundant "giffgaff home" link with "community home".