I've never trusted wot. They are abused by groups of "wot cops" that organize in the forums and target web sites to bash (deserved or not).

As far as the site goes, it looks like they used to be a more generic seo search engine, as recently as a few months ago.

That site is awful. Only thing worse is using BBB for credibility.

This might give a hint

http://web.archive.org/web/*/nerdydata.com