At first, the only humans willing to accept the bargain are those whose difficult lives leave them feeling they have nothing to lose; but in a year or two, these early adopters return to visit "Old Earth" with tales of their marvelous new lives—and the exodus begins in earnest.
At first, only those whose lives were marked by hardship and struggle were willing to make the deal; but soon, these early pioneers return to "Old Earth" with tales of their remarkable new existence—and the mass migration really gets underway.