Report the users posts. Maybe if enough reports are sent in showing how they edit posts for sig pay, it could lead to the accounts getting a sig ban or perma ban. I would only report the edited posts though to try and show their pattern.
By taking a quick look at the second and third photo, you can see that 7 and 5 posts respectively were completely blank, but also all done within a few minutes before 12 am. These users are probably following such pattern for quite some time and many of their posts are conducted this way. Can moderators see that they've been edited? If not, does ninjastic.space record such changes?
This isn’t first time here. A lot of users are having this practices for a quite long time. You know bitcointalk isn't anymore the forum it used to be/it should be. It has gone fully commercial.
Report the users posts. Maybe if enough reports are sent in showing how they edit posts for sig pay, it could lead to the accounts getting a sig ban or perma ban. I would only report the edited posts though to try and show their pattern.
Users will have an argument against a ban for this. It can be a low value content when posted but when edited, it may not be the same low value content. I guess moderator won't take action then.
In this specific case, the ending posts are not too much of a contribution to the discussion. However, back in 2017, I remember things worse, before the introduction of the merit system, the forum was filled with spammers. Currently, I believe that this is caused because of 1xbit's campaign. It's offering low quality/spam posters an opportunity to earn money, in any other scenario, they wouldn't have been accepted in any signature campaign.