На ниво инстанция може да бъдеш долен колкото искаш, на ниво sub/post всеки модератор си решава ;)

• There is option in the admin panel with whom to federate and whom to block.
• Yes, just like I do now.
• Depends on the size, it can very well run on 1CPU 1Mem
• Single instance of the above size does not go over 5$, so for me it's worth.