That blog is a joke. Admin can't read T&C's properly and then rants about it in the net. And the grammar is a poor thing of his.
If you read the T&C's properly it says they can take away your domain at any time when they want to, so you don't have any REASONS TO COMPLAIN. Afterall, you paid $0.
Dot.tk. Can be trusted. If you research it, all rights belong to dot.tk until you get an abassador domain.
refer 75 people and you get a paid domain with all rights to you.