Earlier quoted context omitted.
"Lackluster coverage" is just another word for blackout. It's not like what's important makes the news -- or that media are free to play whatever they like.
Actually media blackout isn't another word for lackluster coverage.
If the intent is suppresing some news story (because lackluster coverage can also have other causes), then reduced coverage is a pretty effective way of creating a media blackout short of issuing direct censorship orders and preventing everybody from publishing anything at all.
The strategy is to control what the public discussion issues are --ie. what everybody on mass media is talking about--, not to stump every inner page single-column article or 30-second mention.