I remember people carolling when I was a kid--maybe in second grade, or thereabouts. In college, there were groups who went around campus carolling, just for fun. It was a good way to get into the holiday spirit.
Most people that do it around here do it just for fun, or as a hobby. There's a big Dickens Fair on Galveston every year (was this weekend, actually) and people go to perform, but they do for fun, not for money (mostly). I know some charity groups do it to raise money, but that's a pretty rare thing.
So, yes, there are still carollers, but not that many. It's just something people do, once a year, if they like to sing and perform.