Max players per network4.99€ / 50 players
This setting let you chose the player base your server usually have, there is also a setting to unlock the player count in the network settings.
Max sub-domains per network1.99€ / 10 sub-domaines
Your subdomains are limited, you can chose how many you want here.
You own multiple networks ? Then you can increase the number of network for your account just below.
Max players per network
Max sub-domains per network