Most comparisons of Zoosk skip whether the active count matches the claimed count, which is the part that matters.
Gave Zoosk a fair run over 4 weeks and kept coming back to how the mobile build compares to the desktop one.
If you can only manage a few evenings a week, how aggressively it pushes credits at you matters more than raw volume on the service.
Happy to go into more detail on Zoosk if it's useful.
Someone in another thread pointed me at the Souldate boards and it was a fair shout.