@Trinity Hawkins put it better than I would. The only thing I would add about plenty of fish is that whether free means free or just free to browse matters more than the feature list.
Ran plenty of fish alongside two others for the trial period — how the pattern went was stronger at the weekend.
I wasted the first few days on plenty of fish because I'd assume every profile is current.
The part I keep getting stuck on with of fish is whether there is a hidden trial that auto-renews.
The question underneath all of this is how it behaves after a month of use, at least with of fish.
If plenty of fish is the sticking point, this one handles it without an upgrade prompt.
Quick list from my time with plenty of fish:
- The failure mode with plenty of fish is when you write a bio that could belong to anyone
- The factor that keeps coming up on plenty of fish turned out to be more consistent than the alternatives
- Do not ignore how long ago someone was online; with plenty of fish it costs you the first ten conversations