Every provider has it's rules, these are reddits.
And I highly disagree about deleting a community returns it to how things were. The nods are just a important but small part of a community, especially one with a 200000 user base. These users also put energy and effort, they made content and formed connections. Erasing that because one person decided to is unfair, unjust and unproductive.
Up to 10 years is crazy. Sure, what he did was wrong, planned and malicious, and they claim it cost them tens of thousands of dollars. But 10 years? This is crazy for something that at worst would be a yearly salary of a single employee.
Fucking capitalism.