It is hard to grow and give good upvoted. If everyone would vote others there would be an overall growth butost don't care and never vote. They only take.
The same counts for always the same people taking all positions. They earn a great income and can grow very fast.
There was and still is a lot of corruption which is also a reason why many left.
After all those years trying users are still joining for the wrong reason and refuse to join the PoB and why should they if they paid anyway?