This is a rare case when the user is satisfied as he can earn kroiptovalyutu, and the project is satisfied as for a relatively small amount of money receives a large-scale advertising campaign.
This is a simple concept and was the reason for such a mega popularity bounty in the past years. In some companies, many thousands of participants were recruited, which made participation less profitable. But it still didn't stop anyone.
I think that the bounty will live forever, the most ideal advertising for those who have no money for expensive advertising, the best option, so to speak