As someone else commented, it appears that the license isn’t free because when you share it the new person now owes the original author a beer if they ever meet them, so the middle person isn’t free to do whatever they like because of the ongoing obligation being forced on their users.
According to the FSF, it’s only free if you tell people what they can do with it, but only very specific things
As someone else commented, it appears that the license isn’t free because when you share it the new person now owes the original author a beer if they ever meet them, so the middle person isn’t free to do whatever they like because of the ongoing obligation being forced on their users.