Such actions have always attracted the attention of users. people love to get presents or some free prizes. This is very helpful in the promotion of the project.
Bounty always favorably influenced the promotion and marketing of projects. This is a very effective way to make a new project recognizable and popular!
I agree, but now bounty, as for me, is not as effective as it used to be, that is why they have reduced popularity and many people do not use it.