The CCC and KS things have been "an issue" ever since they were introduced as far I can tell, the earliest I encountered that "problem" was around summer 2016 (someone being stuck with their black-colored nickname and yellow-colored message-text).
Personally I don't see why having ccc (which is usually default to Team Colors for the name on vanilla-like servers, 2Fort being the example here) and ks enabled despite having (an) expired donation month(s) is an issue.
About boosting the Discord server, you may contact Benedevil about this although it's just giving some server one-or-more points which only benefits a free Discord Server with a vanity URL, more custom emoji slots, a server banner and higher upload limits/streaming- and audio quality which can not be used to pay the servers.
Hopefully this at least helped in some way