There's no way to get negative elo ever, all systems have a cal of 0 there. Typically tbe maximum elo possible is double whatever the default Elo is. There's no true maximum but it ends up being the fact that around 1.5x the standard Elo, you find no consistent winner amongst the group amd if there really is a kingpin powerhouse, they still struggle to find WILLING opponents to face them anymore who are high enough elo to gain them anything at all. This is the key point. People were scared shitless of Kasparov, it's why he began to get elo-capped even though he wasn't losing, people just avoided facing him in general. Oromagi is this site's Kasparov.