Can't change players count via other plugin. Maybe API? + You have small bottleneck

Described the problem here:

https://github.com/PaperMC/Velocity/issues/1624

Maybe, if it can't be fixed, you'll add API to say FastMOTD take value which was set via FastMOTD API?

------------------------------------------------------------------

Also, btw, you have some small bottleneck:

Don't do any math operations if value is constant. Do it only for dynamic values.
You have `+` `*` `+` `/` on each ping, it's strongly bad ☠️

Also update your benchmarks after fixing this one ^
And find similar redundant excessive calculations