In this post of Al-Masdar News @ipromote gives an upvote to the @badcontent "stamp" reply:

https://steemit.com/news/@amnlive/breakingiraqiprotestersreportedlysetfiretoiranianembassyinbasra-wefxdooohf#@badcontent/re-breakingiraqiprotestersreportedlysetfiretoiranianembassyinbasra-wefxdooohf-20180907t160354

So it's a guy or a cercle or a group of people purpously trying to discredit a certain type of news.

Comparable to shadowbanning on Twitter.

The silence from those behind these accounts when it comes to posts like this, when asking for the reason of compromising the reputation of some accounts like AMN is also troublesome.