Phil, I would push back on that. How you use it matters more than which one, and I do not think 50 dating sites is the exception.
The ratio of real to dormant accounts is more useful than download numbers, at least in my experience with 50 dating sites.
The honest answer on 50 dating sites is that persistence matters more than the choice.
If whether the location radius holds up under real use when you test it against 50 dating sites is not there, I do not bother with 50 dating sites at all.
You can usually spot the difference on 50 dating sites by how the account handles a direct question.
For anyone weighing up top 50 dating sites — persistence matters more than the choice.