That was pretty much the only selling point of the game, the render's quality and how the characters were, mostly, pretty.
But there is a point where it is not enough, hell most of the updates were basically the same couple of renders, and you had to redo the same fucking event several times, to maybe get an extra render or two. Even the god damn text was identical.
In essence you could cut the playtime for each release by several fold, since we were only doing the same events, and passing time doing fuck all else, just to redo the same events, again, and again, and again.
That kind of "progression" can only keep people going for a while, eventually, people will get bored of it, despite how good the renders may be.
Fapping wise, each event only lasted by a couple of minutes, and since you had to pass time and redo the same events many times before reaching the next event, unless you're an extremely quick shot, it is impossible to fap either.