You're right, there are other ways to promote but even though they are doing it this way, they are still not being as effective.
I've even spoken to some Brazilians who are disappointed because they no longer intend to buy Premium.
You may have noticed that on Hivebr the number of comments has dropped a lot. This was the result of some "disappointments" on the platform. The last straw was the way they changed the rule at the last minute about the battle of communities...
But life goes on...