The gap between good and bad platforms here is whether the recommendations improve with use.
Took me about 5 weeks on senior sex sites for older singles to work out that the real question was whether the recommendations improve with use.
If you're only browsing, the site is fine. The moment whether 'free' means free to browse or free to talk matters, it changes.
Your mileage on senior sex sites for older singles will vary by city more than by anything else.