With FREE plans, if you have not logged into your website for 6 months, we close down the site. We do this because we figure you are not using it. We also send out several warning emails to let you know we are doing so.
We do this, of course, to free up unused resources. We do, however, keep the websites content for an additional six months just incase you want to reactivate it. I'll have Ben look into this to see if your content is still available.