123DontMessWitMe

Their server has name verification on, so only real accounts would be able to join unless specifically circumvented by the owner directly.
Their server is not on any other server list, like BetaCraft, so there would only be ClassiCube accounts joining.
They have accounts that have been idle for like 18+ hours, have said nothing, built nothing, and have account names that don't exist in CC.
One such example, but not limited to:

Randomize your email address and password. Account names cannot be deleted.

3 minutes ago, MESYETI said:

Anthony

Y'all ever heard of
Yuri

You can't.
Make a new account.

August-October-November has always had the lowest number of players. This happens every year, most likely because of school starting, and then goes back up the rest of the year.
ClassiCube is still going strong and is the most popular it has ever been since it started in 2013. We still hit on average, even now in the low part of the year, 30~ players a day across all servers at peak.

Due to the nature of how account names are used per server, your account cannot be fully 'deleted', but you could randomize your email address and password to render the account effectively 'deleted'.

The entire Gen-Z population.

Move, learn a trade, start a new life, pay off all debts, wake up chained to a pole in Andrew's basement, invest in ShamWow, pay rent for 30 years, I don't know, save it for a rainy day and buy 100,000 umbrellas on amazon.

Processor: AMD Ryzen 9 7950X 16c32t @4.5GHz (100-100000514WOF)
RAM: 64GB (2x32GB) DDR5 6000 MT/s Corsair Vengeance CL30 (CMK64GX5M2B6000Z30)
Graphics Card: EVGA GeForce RTX 3080 Ti FTW3 ULTRA GAMING (12G-P5-3967-KR)
NVMe: 1TB SAMSUNG 970 EVO (MZ-V7E1T0BW)
SSD: 8TB Samsung 870 QVO (MZ-77Q8T0B)
MOBO: Asus ROG STRIX B650E-F GAMING WIFI (90MB1BQ0-M0AAY0)
PSU: EVGA SuperNOVA 850 P6 (220-P6-0850-X1)
Monitor 1: GIGABYTE M27Q, IPS, 27 inch, 2560x1440p, 170Hz (M27Q-SA)
Monitor 2: GIGABYTE M27Q, IPS, 27 inch, 2560x1440p, 170Hz (M27Q-SA)
Monitor 3: Asus PB278Q - 27 Inch, 2560x1440p, 75Hz (PB278Q)
Keyboard: EVGA Z20 RGB Optical Mechanical Gaming Keyboard (812-W1-20US-KR)
Mouse: Razer Basilisk V3 (RZ01-04000100-R3U1)

It runs classicube with at least 2 frames.