sorry i'm not gonna write this very well cuz just got back from a run and tired as **** but here we go
there was only 2 that ever mattered and kind of a third. the 2 that mattered were bout evolution and this one, boutcheetah. the third that was interesting was t-bot as it had some insane updates done to it, we believe they had the source code for the game but i may be remembering wrong
bout evo did a lot of things right, their game was a lot more balanced and less convoluted - however the management was poor as hell, take it from me i was a GM there. their head staff barely knew anything about what was going on in the game as they were all 'too busy' to play or watch over things, so they elected one head gm (jrharbort) to take care of everything but he himself didn't have as much time as he used to. the head staff over there such as hanman were huuuuge angsty pricks and shouted down and berated the staff often. they were really petty against this server too, and most people think this server was equally petty, but it really wasn't - staff members would often flame you if you touched bc over there, whereas here the most petty we did was censor the word (which only a couple of people were even in favor of)
because there was no real head staff that cared and jrhar had left at some point (i also quit after hanman basically called jrhar retarded publicly despite how much jrhar did for them then banned me for defending jrh) it was just a lot of random people who played sector often becoming staff. really no one over there cared anymore and the old head staff may have had some nice plans to begin with but they just didn't give a shit about the game extremely early on.
bc died because kenny got too busy and people got bored, plus there was some drama in 2014 with someone being made staff that went of a bit of a power tripping rampage. but it was the games time anyway, it outlasted bout evo by a great deal and the game just wasn't fun anymore for a lot of people
tl;dr bout evo had horrible management that was condescending and just didn't care. bc head admin lost passion and a lot of people quit at the same time. not sure what happened to t-bot. i guess you could also talk about our bots remake but that's sort of its own project and also head admins lost passion for that as well, it never really took off like the others did
any other private server never mattered and were just made by random hackers that barely spoke english and just wanted to **** with bc or bout evo, they never had stable games and never got a playerbase of more than like 15 active players, and those players would quit within a few weeks anyway