Just to clarify, we don't limit CPU usage at all. You're free to use 100% of CPU when you need it, just not 24/7.
We don't suspend our client's service unless they are running mining related programs (LXC) or using 100% of allocated CPU 24/7 and not replying to our high CPU usage notification.
We are running on Proxmox VE. You should do some research about overselling KVM resources on Proxmox.
We are not overloading our nodes at all. We got better cooling solution than our Ryzen competitors to reach 5.15 GHz boost clock.