Well, the synths that were sampled to make ST-xx discs were popular at that time when Italo, the successor of disco and predecessor of house was popular.
There's C.C.Catch, Visage, and probably a thousand more bands that rented studios, spent 5 minutes on writing the lyrics and started hacking away at cheap synth keyboards to make something to dance to the way they wanted it...
There's a very thin line between Stock/Aitken/Waterman-style mainstream pop hits and italo of the time. Take Billy Ocean, Sabrina or even Samantha Fox, the instrumental sound is practically the same. Italo was a bit more heavy on the sa-sa-sa-sa-sa-sa-samplesynths keys
Edit: oh, you already linked to Sam Fox
It's also very common to hear extremely strange sentence constructions and very thick Italian/German accents of the singers. This genre seemed to attract those.