I am currently on one, but that's Silversurfers which also shares with Saga Connections .
Another one also has multiple dating sites such Older Dating and Yours dating .
Both are run by separate set ups the first by the Dating Lab ,and the second set by another
Doing the local to me search some also appear on Match .com
You could respond to someone who is on entirely different one, then that is when the subscription thing steps you could get bogus messages as well.
Mick
Re painting metal bistro garden set