[2.] Increasing number of posts.
I don't see any benefit for him in increasing the post count because he isn't making quality posts and earning merits. In that case, one would think he is trying to rank up, but that isn't even the case with him.
As much as reports might be the way, be rest assured that, they do get what is deserved as at when the time is due.
Hoping for that, time should have been due already by now considering he has been doing this for some time now.
No need to be in a hurry to complete your post count when the CM probably gave you ample time to finish up.
His motive isn't to get the attention of CMs because his rank doesn't qualify him to join a campaign.
He's on my ignore list.
Wasting more time on reporting his posts is a tremendous waste of time if it doesn't result in a permanent ban. Which is what he should have received a long time ago.
Considering the amount of posts he makes, it's true that manually reporting every post will only waste our time. Reporting a few of his posts and then putting him on the ignore list is probably the best way to go with.