Obviously the more active a user is, the better he would be for a campaign and a company. Hiring inactive users is generally not a great idea at all. I won't speculate that that means it is his alts or anything. I would just advise all managers to look at user activity and post quality when choosing participants.
Obviously, I think this is a lack of professionalism in his work
It seems he only considered the length of the posts rather than the quality of it. As we know, quality does not lie in its length but in its content. And looking through the accepted members, clearly he prioritizes the length. He doesn't even look at the time the posts was made or the uptime of the user As a result, there is a large number of unworthy participants and this topic appears here