[edgyquant]

Source for this? I think this is a commonly spouted stat that applied to non-social media websites. I have trouble believing social media sites have the same demographic makeup.

[badRNG]

It's a pretty well-known rule [0]. There's a good post about this in r/dataisbeautiful, but it is currently private.

[0] https://en.wikipedia.org/wiki/1%25_rule