I've noticed the MeTV airings of The Flintstones now constantly feature "Meet the Flintstones" for the opening and ending sequences, even for earlier episodes. Yet that wasn't the case for the first run on there. Maybe some people really aren't digging "Rise and Shine"?
I recently found evidence that Soundac was around as late as 1981. In the Broadcasting & Cable Yearbooks, the studio was listed up to that year. So I guess it didn't shut down the year Colonel Bleep went off the air (which was apparently in '71).
Somehow, I've only fairly recently noticed that the closing version of "Meet the Flintstones" has this line alluding to a certain scene: "Someday, maybe Fred will win the fight. Then that cat will stay out for the night."
To further show how CN ratings aren't as relevant now as they were before-
During the early '10s, it was a special occasion for a premiere to break 3 million. Now, it's special to break 1 million. To put it another way, it's hard now to achieve even what The Problem Solverz got on average, never mind Adventure Time or Regular Show back then.