Limbaugh once stated that when he ran numbers, less than .01% of radio listeners called in, and that the perception that taking a lot of calls improved ratings was bull. That's why he clearly states that the reason for calls is to make the host look good. Web sites are similar, that a few readers make hundreds of comments, and most make none. Political campaigns have paid flying monkeys that make posts on web sites.
I noticed a couple of years ago that news articles that were clearly paid for by governmental agencies to push an agenda didn't allow comments. Most obvious was the ones trying to outlaw vaping.
You're comparing apples and oranges.
By definition, access to Limbaugh's radio show is limited. He has what, one call screener with an overly burdensome list of screening questions, from what I understand.
"Print" media is different. I can sympathize with editing out the "disguised ads as comments", though. (Limbaugh sleazes in ads attempting to pass for commentary, too...)