The first Urban Dictionary entry on “S-Cute” was added in 2007, defining it as the combination of the words “sweet” and “cute”, resulting in the portmanteau; “Scute”.
It has had a limited use, both on- and offline, with only a few people using it to express their admiration of a cute thing or person.
“S-Cute” is still not one of the most popular terms out there so detailed information about the spread is unavailable.
After its first entry in the Urban Dictionairy back in 2007 the term was vaguely used.
“S-Cute” is a popular adult entertainment category these days, adding further to the reach of the term, mostly being used to refer to cute Asian girls, both real life and Hentai versions.