No they were not hinted,especially not in case of Sage,nothing pointed to her having a rich family and its still unclear which family that might be.
You might or might not remember some theories about Rusty being a drug lord and such other non-sens,why?Because there were no hints his background either.
Jade Stephen and Tybalt have the same last name,in real world some one would notice,everyone would notice but lets not confuse reality with the written fiction
Everyone at B&R might know but we,the audience do not.
Going back to Sage,Quinn most certainly knows who is Sages family but she didnt told anyone,not even me