I use Barebackrt, Squirt, Adam4adam, Sniffes, Double List, Fetlife, Asspig and a couple others
What I have found is that in most i believe there are the same guys, different IDs, and slightly different Bios. I am a person that notices patterns ( Been this way all my life } and everyone usually has their own style of writing messages and replies. If they ghost you on one, they will probably do the same on the other.
This is what I have seen over the years.
BZ - I tried to use it but haven't had any success there, no matter what city I travel to. But I love the stories and content
Sniffies - New to it and have gotten a couple hookups
Doublel List - Have gotten a few good connections since it replaced Craigs List ( May it rest in peace )
Adam4Adam - had a little success in the past decade
Asspig - years ago it was great to find guys to use toys on me and stretch my hole
Squirt - Have gotten a few connections but they tend to not was any kink or bareback
Barebackrt - About the same as others but I have gotten lucky in other cities to get bred in hotels, anon
The Best was Craigs list but we all know about that story.