[dingledork69]

Addiction and the fear that reddit staff will just appoint new mods, like they've done before.

[koheripbal]

Also, the mods don't do it for free at all. They get paid to promote content.

All the primary mods on the big subs also have online social media marketing consultancies.

[worldofmatthew]

Most do it for free. Powermods often are getting paid to promote stuff.