I never saw it there tbh. I just assumed the author didn't show the PlayDRM on the page.
This message always appear when game have it (cuz site rules, and if game have PlayDRM, but page didn't have that message then you just waste your money, cuz site didn't give you code to unlocking game (and yeah, you need to wrote code every game start, and not ctrl+c\v, literally always tapping)), and this game have it before, but now it's gone, and as i remember author of other game (
showdown! ANDROGYNOS) said that this shit makes many pain in ass (like for example other system like this what being annihilated after some years, but i don't remember the name - you always need internet or it reset your code, it can just forget who you are and block the game until you don't get new code, they might stop game cuz smth went wrong etc) and that's why he remove it. (sorry, my english is bad)