Did you miss the part about the $25,000? Best as I can tell from the TED website, that's the admission to twelve TED conferences. Or two to three years of state university tuition (depending on your home state). Or a very very large book collection. Or one hell of a lot of plane tickets to see the lectures that every "famous futurist" gives for
free, or for a relatively modest conference fee, multiple times per year. (If they didn't give public talks all the time these people wouldn't be famous futurists! And I assure you that the more obscure futurists, toiling away in academia, are almost certainly available to chat with you at a personal one-on-one lunch for a lot less than $25,000, or even $2000.)
But, you know, one of the side effects of population growth is that there's now more than one sucker born every minute.
UPDATE: Someone else in the thread says TED costs $6000 for four days. So, only four TED conferences. Or something. If you have to ask you probably can't afford it. ;)