Currently POB is definitely not able to get people from the outside to join and that would be a problem, if we were trying to conquer the world.
Other tribes (Like Leo) have shown, how good content can drive a token's market cap up. So I see it as a great opportunity to earn by staking and especially by actually writing! It's pretty hard to work yourself up the ladder on hive or leo, while pob is extremely profitable.
In the long run it would be awesome, if we were able to decouple the token from hive and get listed on the outside. But this is not a prerequisite for success.