Sorry, Tuan, your amendment is still wrong!
Tuan, Your amendment says: The post was amended to state more accurately that the balloon doesn???t go high enough for passengers to experience the same ???sensation of weightlessness??? caused by microgravity that astronauts feel aboard the International Space Station. Previously, I mistakenly referred to this as zero-G.
Your attempted correction is actually just as misleading as the original because it leaves readers with the impression that gravity really does go down close to zero if the balloon were able to go high enough - e.g. from 22 to 220 miles. Actually the reduction simply due to that change in balloon height (impossible in practice of course!) would be a barely perceptible 9% in body weight.
It is not because "the balloon doesn't go high enough" that the occupants fail to experience the "same sensation of weightlessness" as they would in the ISS. As several of your respondees have already pointed out, the ISS occupants experience weightlessness because of the high angular velocity of the ISS around the earth which causes a centripetal force which exactly balances the force due to gravity at that height. In other words, it is in orbit! In comparison, the balloon, of course, has no (significant) angular velocity around the earth so there is nothing to offset the force of gravity however high or low it goes.
Incidentally, the so-called "microgravity" experienced in the ISS is nothing to do with some vestige left over of the actual gravity at that height. It is simply a (slightly confusing) scientific term describing the situation in an environment when the actual gravitational force is exactly balanced by the centripetal force - i.e. it is indeed a condition of true weightlessness.
