They use those discs and no, they don’t scratch the screen. There is a thin adhesive film at the side that touched the screen. When the screen is to hot when you use itm like during games, there is a slight chance that the film gets loose. (had dat happen with 1 of the discs after years of use) The replacement discs are expensive compared to the pen, but I bought 2 pens in 2017, my wife stopped using them, but I use them daily and had to replace 1 disc in al those years.
I got my hands on 2 cheap predecessors (I guess, the 1.0 version) but either they were cheap knock-offs or a bad batch. Also the discs weren’t compatible (main reason I bought them). The 2.0 version is slimmer, which I prefer.