This seems like Facebook's trying to break more into the realm that the big credit agencies have occupied re: data products.
All the big credit agencies (Experian, Equifax, Transunion, etc) have products that cluster people into socioeconomic groups, with ridiculous names.
https://www.experian.com/assets/marketing-services/brochures...
Examples from that brochure:
"American Royalty" "Small Town Shallow Pockets" "Full Pockets, Empty Nests"