This can be a fun thought experiment to play around with. You suggested an unlimited number of accounts. Each account would have to have enough Hive Power to give it the resource credits to sufficiently keep posting. That would increase network traffic on the blockchain which would then increase the transaction fee of resource credits to make a post.

There is a finite amount of Hive. Some are on exchanges and some are privately owned. Would buying all the Hive from every exchange be enough? It could be like trying to accelerate faster than 99.9999999% the speed of light. Just a fraction of increase requires more energy than is available in the Universe.

Maybe just receiving every possible buzz post would be better by connecting to all possible versions of d.buzz that exist in a multiverse. Storing those posts is an issue since there would be more buzz posts than atoms in the Universe to store them on so so the server would also have to exist in multiple universes.