Got it, thank you! I wonder if it would help slightly to call that button instead of "login" as "login with LN" (or use the lightning icon)

nout

The heavy bots use different User Agent, so you can catch those. Also the main bots respect robots.txt.

Probably hard to distinguish from bots...

kilianbuhn

Over the last 36 hours, we've had 2k+ visitors but only ~500 logged in users visited.

Not exactly, but I guess at least 50%. 

Over the last 36 hours, we've had 2k+ visitors but only ~500 logged in users visited.