As I said... MOST of the time, those edits come directly from the Record Companies, themselves.
In my case, it was actually VERY FEW songs that required this editing on my part.
I was the Music Director for WFIF for 17 years. With a very small staff, I was also the Morning Announcer, Chief Engineer, Traffic Manager, Production Manager, and phone-answerer. I talked to a good number of listeners. They very much appreciated the sound and style of the music we played. It was also the decision of my bosses, and they were pleased with the job I was doing. For about 16 of those 17 years, they basically gave me almost complete autonomy over the music. The listeners loved it, so Management was pleased.
If that isn't a win-win, then I'm sorry.
Christian labels have commonly serviced stations with singles that have many different edits and mixes (Intro, edit, Bridge edit, guitars down, etc.). The mainstream side does it as well, but CCM does it to an extreme, sometimes trying to get songs to chart in 3-4 different formats (CHR, Rock, AC, INSPO).
It's kind of ridiculous, IMHO.