A lot of players, myself included, simply skipped anniversary altogether or as other said, won’t make alts or if they do won’t pug.
I don’t enjoy farming and I want to burn consumes when i pvp - GDKPs let me take my main into a raid and get gold to buy a week or two worth of consumes. I don’t buy gold so take away gdkps and I am not interested.
This isn’t to say the gdkp-ban should be removed in anniversary, but it does mean that there will be less total raids.