I dont like Omarcy and DHH but its pretty obvious why hes getting the funding and not other projects. The reason this gets funded and stuff like Gnome and KDE doesnt is because DHH has influence, he isnt a foss purist and he has no bureaucracy holding him back.
No one cares when KDE makes a post trying to drive linux adoption. When DHH does it drives thousands of new linux users. DHH alone can market the distro to new people in a way most foss projects cant.
When a company tries to partner with another project not only do they get very little exposure because the community is small and resistant to advertising but they also often get attacked and purity tested by the users and it generates bad press. When DHH partners with a company his users think its cool and try out the product. It doesnt matter how scummy the company is or if its closed source subscription only.
Investors also see Omachy as something where changes can be made without needing 4 years of arguing with one guy rejecting every change. A fast moving tech focused platform with a good marketer could pull people out of the microsoft apple ecosystem to a place where products can freely compete without entrenched platforms stealing their idea and making their version the default