well,the key for fortune-telling is,

their audiences don't know each other, don't see each other so they can't compare notes.

you'll be very impressed when he guessed it right, and talk more about it, like you did, and the rest of the audience with the wrong guesses will just shrug it off and forget about it and move on.

This is the key: all they need is just a small % of the impressed ones. They have thousands and thousands of customers, even there's only a 20-30% chance(which is much much worse than throwing a coin) they guess it right each time, odds are that with some customers, they guessed everything right 10 times in a row.

I don't deny that the good ones are experienced and good at observing and have more odds of being right, and because this is exponential mutiplication, their impressed customers will be exponentially more than those not so "good" ones.

All they need is a few really loyal audiences that'll trust them with everything(and advertise for them too). After which point, they'll stop "predicting" the past and tell you what to do in the future. Do you wanna know? Gimme 1000 dollars! $1000 for advices like "go west"? lol...

statistically, assuming all divorced people re-marry, 50% of people marry at least twice and 25% at least 3 times, and don't forget, that's for all age groups, including the newly married. the odds of people marrying multiple times is greater for older people, so maybe because you look really aged, i mean seasoned? and they figured out how old you are from your birthday? lol... There's a greater than 25% chance that he's right if he guessed it by doing the simple probability analysis and by looking at you.

Although 50% of odds is more likely to be right, but a 25% odds of being right is certainly more impressive.

This is important, being impressive is more important than being right, that's another thing about fortune-telling.