I just noticed the following:
Might it be potentially more beneficial to include a shop front within the manjaro.org site itself? In particular, for branding purposes.
That is all. Cheers.
Its a ‘cafepress’ like service.
They cant really do much besides an iframe or a mask.
I have varying opinions about masking such things … but some conventional wisdom states it harms your SEO ranking. 
It would be better if they actually produced products with a decent screen printer or something, with self-managed shop, but there never seemed to be much interest in doing so.
Ultimately this hands-off approach has been considered more practical.
But with both the original graphic designer and web designer team members having left or changed, and with the recent website redesign, who knows what might happen in the short future.
This is (more or less) what I had in mind; and there are some very nice shop fronts out there to be had. I imagine not so many happen to be open-source though, which is possibly a deal breaker.
At least the topic is here now, and might generate a few ideas from the masses; maybe some inspiration will come from it.