MySpace had a very significant mindshare among a similar population segment. IIRC it wasn't obvious until ~2006-07 that they would be overtaken or that the relatively superior UX of Facebook would matter so much. Looking back now, having been on both, MySpace had an uneducated feel to it that was somewhere a little bit higher than Youtube comments but not by much -- chain letters, trolls, fake profiles, random friend requests and ultimately a lot of spam -- these were things that all made FB shine by comparison as a college-only network (it came to Berkeley ~2004-05)

But certainly by that time, "ordinary" people were already primed for online social networking. I agree that this doesn't quite extend to GeoCities though.