I'm not against the idea. Just the side effect it might cause of preconceptions of a GM before you even talk to them. Causing who you might have given a chance and learned to like, to turn into going in wary, and looking for reasons of your 'suspicion', as the GM score was low. Luckily (I suppose), I myself don't have any LFG type setups. My group has been the same people I personally know, for the years I've been on here. Now don't take me saying that as a brag, more that hopefully my opinion doesn't 'have a horse in this race' to skew it. Me and my friends have had this discussion before outside roll20, but it can be applied: What makes a 'Good DM/GM'? A high turn over might not indicate it. They might be an AMAZING GM that fit to only one type of playstyle and people join to find the story/acting/characters are amazing, but the GM's preferred play style when it comes to some mechanic..not so much to them. For example (lets argue I am the best GM ever. I'm not...at all..not even close, not even of the 3 GMs I know, but for arguments sake). And I have a LFG up. I love and insist on tracking everything: Rations, water, weight, sleep in hours, mount's feed in pounds, where you left mounts when you went inside cave, what might attack mounts while in cave, (And so on). I could wager 3/4 of players would leave going "Jesus Christ during downtime its like an 'Excel Inventory Simulator' tabletop game." And some select deranged few would go "This is amazing, no GM I had before got this passionate about us having to pre-plan and think ahead..it adds so much depth and risk to our travels. Spending 20 minutes a game thinking hard about what gear to move to my mount before going in the cave make me really appreciate having to think about what I really might need in there." (There are the odd ones like me that like that...we are a strange breed..lol). I might not ever find the ones that like it, if many that did not joined and left...scaring off the others due to 'minunderstanding why the others left'. It also gives new (fresh to tabletop) players no way to know if its a "Bad" GM, or just an inexperienced one. Which they might be ok with or even prefer, since they are also. Maybe they dont mind a fresh GM, as they are fresh and dont want to feel like the 'new dumb guy'. They have no way to know if the high turnover is from him being an amazing veteran GM that runs high volume games trying to accommodate everyone to get a chance and/or runs adventure path games, if its because hes a 'newb' GM and veteran players wanted more experienced, or if hes just a 'dick' GM that no one likes, new or veteran. My point is, and maybe its the old school 'meet and greet' in me. The only true way to know if you would enjoy the game would be to talk to them, sit in just a few hours of a live game as an observer and decide. I actually knew a GM in the 90's that DID have a high turnover rate in my local shop due to many people having 'opinions' about him. I was in one night and decided to see what it was about. Best GM I had up to that point in my gaming. His playstyle is what made me decide "Yes, this is what tools I want to borrow from him when I run mine.." I would have never know it if I didn't actually talk to him and sit in on a game vs taking the 'crowd' at their word that his games are too damn tedious, ridged, and he was too 'power hungry' (He was a stickler sure, not power hungry). That no amount of points/upvotes/player counters will let you know if you will enjoy a GM. Just if others, you never met and might be totally different playstyle..didn't like him. Like back in the days where you went to game shops and saw postings on the board for looking for players. You show up during gametime, listen and watch and go "These guys seem ok". It's like asking 4000 strangers you know nothing about, if they like a particular flavor of icecream. It might be the best you ever had, and will never know because others said it was nasty to them. Essentially, its hard to quantify personal taste, to a universally applicable stat. Without alienating some portion of the people. 500 join/leaves that was for "Hes a round peg, that doesn't fit my square hole" in no way helps a player that is a round peg. They would end up trying the places the 500 went to, to realize "Wow, umm I dont fit in this square hole everyone seems to recommend".