My rule for Cam4 now is simple: check what happens to your data after you delete on day one.
Gave the platform a fair run over 5 weeks and kept coming back to whether the search actually respects what you set.
Where it works it works fast; where it does not, whether a phone number is genuinely required is usually the reason.
Before committing time to the site, work out what the subscription actually unlocks.
Reply rate on it roughly doubled once I stopped leading with a compliment, though how well it holds up once the novelty fades never budged.
Your mileage on Cam4 will vary by city more than by anything else.