It wasn’t a parameter but a trick.

This is a little fucked up:

You go through their rating game where you can rate people 1 to 5 stars.

(Optional): You rate everyone you find attractive five stars no matter how attractive because you’re going to need a way to differentiate later...

Go through and rate a bunch of ugly people four stars. A shit load.

When you get rated four stars or higher you get a notification. Those people usually come back and rate you. Hopefully four stars or higher.

So now you’ve crowd sourced ugly people to say you’re good looking but that ugly person is never going to get the feature turned on for them because nobody else is saying they’re good looking.

Now you show up to the hottest people and the hottest people show up to you.

I’ve done this a few times over the years with burner accounts to test it and new accounts just because I canceled an old one.

It takes a few hours of rating unattractive people. I usually just did it flipping through on the toilet for about a week.

If you don’t care about keeping track of the five star people you can just write a script to four or five star people at random And let it run overnight.

I assume they mean the radius was a parameter in the URL so changing it was easy, e.g. replace &search_radius=5 with &search_radius=1.