What Jenna described matches my experience of hookupers almost exactly.
If you only test one thing on it, make it whether people reply or just collect matches.
Deleted and reinstalled the site twice before accepting the issue was whether the good profiles are already taken and not my profile.
If you care about how thin the pool gets outside big cities, that alone should decide whether the site is worth it.
Where it stands or falls is how long a bad account stays up.
What I would look at, in order, for hookupers:
- Whether the hookupers photos survive a reverse image search
- Whether hookupers shows you who has actually read a message
- Whether the hookupers match count moves when you widen the radius