Where the site works it works fast; where it does not, how well it holds up once the novelty fades is usually the reason.
What decided it for me with affair websites for discreet encounters was whether 'free' means free to browse or free to talk.
Filling the profile out properly changed the service more than switching platforms did, and it reframed whether the good profiles are already taken.
After a few weeks on it the only question left was how thin the pool gets outside big cities.
Took me about 4 weeks on affair websites for discreet encounters to work out that the real question was what a search of your username turns up.
Would be interested to hear if affair websites for discreet encounters worked out differently for you.
The closest alternative I found was Datewander.