There is a community account which can function like any other account does, but that's not what the paper is referring to. In the original design specs, community owners were intended to be able to set a reward beneficiary percentage to the community account. So a community could take 5% of all the rewards generated within the community for example. I'd been under the impression that these sorts of monetization tools were still in the works. I'd be more curious if this callout in the whitepaper means that intent is no longer there.