Homeshare fits the description.[1] Not finding any other articles which mention this problem, though.
[1] https://www.businessinsider.com/homeshare-rents-luxury-apart...
[1] https://www.businessinsider.com/homeshare-rents-luxury-apart...
Main page for California small claims courts.[2] Some things can be done online.
[1] http://mcwrealestatelaw.com/eviction/arbitration-clause-in-y...
As someone asked somewhere, "Why does Twitter need hundreds of developers? It's basically a CRUD interface."
The business model as I understand it is they pay for any missing roommates rent until the spot is filled? Maybe they had a fragmentation problem? 30 people move into 10 rooms, 10 people move out, negative 30% income.