It's a community free2play mod, not like other commercial pay2win games.
But the game itself isn't a free to play game, i dont understand your point about telling me that "mods" would not need pinglimit? the game mechanics doesn't change even if it is a mod. It is normal that there are servers for americans and for europeans, the reason for that is the ping difference which makes the players with big ping harder to hit and honestly i dont understand why i would like to play on a server where i have 200 ping, it makes playing the game a lot harder and more annoying for everybody.
So what i was trying to say, (im gonna try to say it so simple that anyone can understand it):
The hitreg system can't keep up with the pings, it is a fact and you cant deny it.