I don't know or care about his relationship with the UO guys, but it should be marketing 101 for professional runners to have a good social media presence. But NOP didn't even have a website until this year and Rupp has almost zero social media presence as OP pointed out. Ritz and Centro have some presence but they are apparently just doing this on their own. With Rowbury joining them they get someone else with a decent social media presence but again it's apparently just stuff she does on her own.
This is strange to me for one of Nike's marquee runners and marquee running group not to be marketed better because Nike is usually a master at marketing. One of the world's great marketing organizations is barely bothering to market some of its top distance runners. It would do Rupp, NOP, and running in general good if Nike put a tiny bit of its expertise and money into marketing Rupp and NOP.