I saw on sale hundreds of accounts from 1 seller of the rank of a member and full member.
Then it is necessary to deprive the signature of all the ranks below the Sr.member.
Some bounties of the company require 10 posts a week, some 20, and some 50.
Can be imposed a ban and set a maximum number of posts for all the bounty companies. For example, not more than 10 per week.

You say that it's bad when a person gets it and gives nothing in return. I agree with you. But on enthusiasm, too, will not last long.
Therefore, there must be a balance.