What's the Point of Teacher Horizons?

Don't get me wrong, the UX is pretty nice, and the jobs seem legit, but it seems like very few of their schools are "verified". As in, they haven't visited the huge majority of them and checked the validity of the information. Also, if you already use Search and TES, what additional jobs does Teacher Horizons have? It seems that they have lots of very, very low tier schools that aren't found on other platforms but aside from that I can't see any reason I would bother my referees with creating a full TH profile.

Finally they seem to have quite a few Australian and US schools that don't offer visas. So why are they being listed on an international teaching site?

Am I missing something? I get the original idea of TH, but it seems like a pretty irrelevant platform amongst current competitors