Having the forum moderator pick individuals based on a loose set of qualifications doesn't seem all that arbitrary to me.
I just think that too restrictive qualifications (such as the one suggested in the OP) and no qualifications at all are the ways in which this wouldn't work very well.
Sorry, I misunderstood what Misty was saying.
I thought he said that if a star poster didn't want the extra space, They could gift it to someone else.
I was against that because it was arbitrary and unstructured if someone didn't want the extra space. However that thing I disagreed with was a fabrication of my brain.
I'm all for other people benefiting from it, It's just that star posters are easier to justify, Hence why I mentioned star posters in the OP.