People have the rights to believe what they want as long as it doesn't make harm to others. It plays the same role as drugs except it doesn't cost public health: it gives hope to some people that their life could change.
Everybody needs to hope rationally or irrationally does it really matter
I do. I foresee a man named Mark, in here, soon, words...
But seriously, yes, it is a big business here too (Italy). But thankfully the media is beginning to expose and crack down on it. The "magic" shops that blackmail you into buying their talismans or face the "consquences" are very common.
I spent time on Yahoo Answers for a while, and I was astonished at the number of Indians asking who they were going to marry based on their birthdate, and similar questions. They were quite serious, too.
History has shown that the more difficult and stressful a person's life is, the more likely they are to believe in the supernatural and/or religion. Probably because they'd go crazy if they didn't have something outside themselves to look to for help. So as long as there's unhappiness in the world, fortune tellers will do well!