A cousin found me on Rootschat by entering our mutual ancestor's name into Google! We're both very happy he did because he isn't on any genealogy websites.
I wouldn't have found this cousin because he is descended from my 3rd-g-grandmother's older sister and I didn't know what had happened to her after the 1841 census. I still can't find a marriage for her, so I never would have figured it out on my own. I imagine she and her husband were married in a synagogue and, if their marriage was registered with the government, I don't know what happened to it.
Having said that, I, too, was surprised the first time my Rootschat posts come up as a result of a Google search.
Regards,
Josephine