Board Thread:Lore Discussion/@comment-85.87.179.48-20130620091301/@comment-6881629-20130620094600

I think its becuse Sithis Anu and kinda Lorkhan (as he's dead-ish) don't really do anything anymore so most people don't worship them but the Aedra and Daedra still influence events so people worship them.

Sithis is sort of an exception as being the deity of the void he doesn't have to much.