As seen on picture on left side it says 1/256.
Probebly DICE limited it to 64 becouse of tooo much lag.
Someone found a way to unlock the closed slots.
I have no clue how they did it.
I joined server and it worked.
Laggy as hell but it worked, think it was about 100 players online at that time.
Chinese internet wasn't the best at this time.
Because of my bad skill in reading chinese, I took a chopper and fired away,
kick/ban
This was a few years back and many patches ago, could even have been the cracked version of BFV.
They probebly didn't know how to remove vehicles and banned everybody who used them.
So start cracking and open those 256 slots up guys!!!
Hardware is a lot better today then 4 years ago.