So by my math and some googling, that's about 0.0000005% of Reddit's MAU.

On the one hand, cool, growth is growth.

On the other hand maybe it's... healthy to stop looking at Lemmy as an "alternative" to anything and start thinking about it as this small forum you like to use sometimes. Worked for me in the 90s, works for me now.

You’re off by some orders of magnitude.

It’s 0.005%

But that’s based off of the 1.1 billion number I saw. Somehow I very much doubt there’s 1.1 billion people with accounts who login and browse at least once a month.