The problem is that Hive cannot compete with Twitter, or any other such platform, without full centralization.

Twitter is growing its base by 4.3PB per year. Only the largest companies can afford that kind of space, and then it would mean that Hive would be in the hands of a few of the largest companies.

The only possibility is to have Hive small as possible (so no-one can publish posts) or someone will rewrite a protocol