I came to screening a service from the paid apps and the difference was noticeable.
My read is that screening a service lives or dies on how many people locally are already on it.
With screening a service it came down to whether the search filters did what they claimed, honestly.
Everything about screening a service hinged on whether anyone replied inside the first week in the end.
My advice on screening a service: screenshot anything that looks like a scam and report it.
The real differentiator across screening a service turned out to be how much personal data the signup demanded.
Careful with screening a service, because profiles that answer instantly and perfectly are usually not people.
That said, I would still hear other views on liveprivate com.
People also bring up Turndate fairly often in these threads, though I have not tried it myself.