Early investors get the best interest bonuses. But this is a payment for their risk and the fact that they were among the first who believed in the prospects of the project and decided to provide him with financial assistance.
This promotion method is still used because it is one of the cheapest ways to promote a project. Efficiency for such a price is appropriate. Now this is even more pronounced, since users in social networks are accustomed to crypto news, there is no growth, and this is perceived as a belated obsession.
In social networks, even entire groups are dedicated to bounty companies. Subscribers closely monitor new posts and complete tasks to get new tokens.