Short version on cheap cam sites: it depends far more on your area than on the brand name.
Ran the room alongside two other options for a month, tracking how discreet the notifications are.
Before committing time to it, work out what you lose by never upgrading.
Once I fixed my filters, whether 'free' means free to browse or free to talk stopped being the bottleneck on the room.
Unless you are in a major metro, expect how the pricing behaves once you are invested to be the limiting factor on the site.
Is cheap cam sites still like this, or has it improved?