A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate
in the Unity community.
"Unity or no Unity - Run your cloud servers from a Unity instance or run them standalone for a little extra performance."
Does this mean you can...
Photon has CCU to use their relay, matchmaking, etc. UNET is similar but more expensive.
Bolt is still "really good" :)
For Forge you either...
Come to the Jabbr we'll help you out