You don't need spreads like that if you are backcounting. It's true that NMS restrictions make backcounting difficult at high bets, but Wong-out play is almost as effective and a 1-8 spread works just fine for that.
The EMFH (kind of a misnomer, because every man isn't playing for himself, he's playing for the team) also has the benefit of a Cicada attack. Cicadas live underground and come out en masse every dozen years or so. They are slow and easy to catch. They have no sting or poison. Their only defense mechanism as a species is all coming out at once so that predators can only catch a small percentage of them during a cicada storm.
Likewise, a well-disguised EMFH team can take over a casino with a good SD or DD game, one player per table, and all start spreading like crazy. Most casinos don't have more than a couple of employees skilled enough to catch counters, it'll be a long time before they can figure out what's going on and who's involved. Especially if each counter makes a big stink as they get picked off, maybe even feigns an injury or a panic attack or something, it'll take a lot of time and trouble to get rid of them all. A special benefit of this kind of team play is they don't even have to share bankroll! Just the added time with a big spread they get from being "cicadas" is enough to dramatically increase EV for each player. They can each play their own betting unit, their own spread, anything they want and it all remains equitable.