OK, I was wrong, .tk is free (I just got statute.tk and statutes.tk) I redirected them to abqlegal.org and eventually I'll setup some subdomains on them like NM.stautes and TX.statutes etc., and upload all of the state statutes annotated, a big deal if you have ever tried to lookup a law for your state only to find they wont post annotations which are the key to finding the case law to work a legal case pro se.
I operate a legal aid clinic in Albuquerque that does NM legal cases for FREE, I am expanding our bar creds. for web based legal services to include all us states, ABA; and provide something like lexis-nexis without the price tag, citations or the support.
I think the best way to get spidered by google and bing is to add the .tk links into a sitemap.xml on my .org tld's. I googled .tk and the index was pretty weak, only 4 .tk's and then it went to .com's with discussion about tk extensions; Have you had any luck getting your .tk pages indexed with the search engines?