accounts !== people.
Many accounts are bots, sockpuppets, or other accounts-of-few.
For me the question is - why people should come to HIVE at all. It is easier just to buy and hold some popular tokens. Three years later there still is no clear answer to this question.
Hive.Blog is not HIVE, you're aware of that, right? People don't have to come to HIVE. Apps have to adopt the Hive blockchain + currency and people will use HIVE through those apps.
RE: Can Hive scale under its current reward distribution mechanism to millions of users?