[hu3]

But can any mod remove other mods? How does that work in reddit?

[vintermann]

Seniority. Older mods can remove younger mods.

[ahoka]

So just try to buy or steal the most senior mod's account and then you have the mod for yourself? Ouch.

[hpdigidrifter]

Strangely not mentioned much in here is how these accounts are up for sale.

It's definitely never mentioned on reddit because simply saying one of the websites in an offhand comment gets you a sitewide ban and your comment deleted.