If gays are as small a minority as some claim, and if they’re as reluctant to marry as some here believe, I would think it wouldn’t be that much of a windfall.
It is merely another tool to abuse the normal people of the nation. In practical matters it affects d@mn few of them, but int terms of giving them a huge club to beat people with, it's enormous.
It is valuable to them because it is a key that has unlocked a whole host of both legal and social doors. It "normalizes" their aberrant behavior.
I guess it depends on where you live.