Permanent link: https://git.io/why-my-tk-site-was-deleted
UPD: Now (October of 2018) Freenom informs you a few days before deleting your site. Thank you, Freenom!
I sustained a site anticensority.tk registered by Freenom.
Site/domain was heavily used but had almost no HTML content.
It also was behind Cloudflare servers for better caching.