I don't know if this has come up before, but I propose that anyone who GMs a game should have "Gamemaster" printed on their badge. I don't mean they should get a free badge -- the EH policy currently refers to "complimentary GM badges", but they don't have to be the same thing. You should still need 70 player-hours of events to get a complimentary badge (*), but running a single game should result in an indication of that printed on your normal full-cost badge.
The first reason for this is that it's an incentive for people to run games. There was a thread a couple years ago looking for ways to convince people to run games -- adding some kind of recognition to their badge is about the simplest thing Gencon could do, while still being a nice perk. There could even be different iconography/terminology to distinguish people with 300 player-hours from people with 8, if that's a thing that people would find valuable. But right now people who run less than 70 player-hours get nothing, and this seems like a trivial thing to reward them with.
The second is so that players are less confused when they walk up to the table. Everyone on this forum realizes that it's not the case that only people with GM badges run games, but I think this confusion still exists amongst a lot of Gencon attendees. In two of my three games the first player to arrive walked up, looked right at my badge, and asked me if I was the first one there. Both times they seemed surprised when I said I was running the game, even though I was actively setting up the game board. After one of the games a player asked if I worked for the company who made the game, and in the resulting conversation it was clear that he had no idea people unaffiliated with gaming companies/groups ever ran games.
I don't really see a downside to this, but possibly I haven't thought of something? The general theory I've seen on the forums is independent GMs who don't have enough hours for a GM badge should find a gaming group to join, but I don't really want to leech off a group for a free badge -- if I'm going to get a free badge I'd like to earn it. It does feel like I've "earned" a GM badge though, I ran a non-zero number of games. I see little reason for these things to be coupled this way.
(*) I also think there's an argument to be made that either every player-hour should count towards 1/70th of your badge price, or player-hours should carry over from one year to the next so you can e.g. run 10 hours a year and get a free badge every 7 years, rather than there being a hard line at 70 hours. But that's a totally separate thing with a lot more potential for problems; I didn't want to get too sidetracked in this thread.