I think people that do care about this stuff already make webpages that are minimal. So there is probably no need to have a completely alternative space. Maybe just a directory/search engine that only indexes such pages.
Maybe a "Web Ring" that promotes such sites in honor of old web rings. Stamp your site with the minimalism stamp of approval.
Yes, and we do this search: https://bubblehunt.com
Right now 1 link - 1 indexed page. And in the future we think to upgrade it - add 100 best resources about design and create best information bubble for this topic.