They weren’t very successful pop songs? Singles from Invisible Touch were all over top 40 radio stations all through the late 80’s and early 90’s. Every supermarket, dentist office waiting room, every car radio played those songs. You get the point. Disagree strongly that they weren’t successful pop songs.
They were extremely successful pop songs, huge but you are basically saying, correctly imo that they achieved elevator music status, although they would still throw in the occasional odd one and some fans might have a problem with that.