Good grief, Kite!
I guess that's for the well-heeled without quite enough data yet to nail down their membership in the Sons or Daughters of the American Revolution. (Lah-ti-da...)
I was originally attracted to it because I was offered some deal that was hard to refuse. Can't remember what. Maybe a $49 annual membership or something.
When that ran out I let it drift for quite some time, but I found I badly missed their search engine. It has a habit of turning things up neatly that had escaped me elsewhere. When I found a few bucks to spend, I therefore jumped back in. I see their full annual membership is listed at just under $90 US at present.