Thanks for the quick response. Seems odd to have an activity that has nothing to do with site activity be the only thing that counts as activity, but I guess it's what I agreed to.
This past week I logged into my account several times to create new pages. In spite of this, I got a suspension notice yesterday for inactivity.
Unsuspending was easy, but I am still confused as to why no activity had been registered. I was logged in as an admin, because I made several changes...