Example, a mod at /r/music remarked last week that they’ve been paying a few bucks a month to host a server for some additional features for years. It’s common to use some automation to summon mods in a discord so someone near a computer can execute the moderating, since the mobile tools are so limited.
And ofc as other uses pointed out, that’s 3% of a sum including the vast number of auto moderator mod actions taken on the site, which are not really human originated at all.