I mean I get it.
Trying to tie yourself to a set update schedule is nice. I would much rather a developer who is active and has a weekly "This is what we've got the last couple weeks, check it out if you want" than a developer who goes 8 months without updates.
Not to mention that porn games require an author, who is into making porn games, who also is handy with programming/renpy usage, who also is an artist or has the funds to hire an artist, or the skills in using the rendering engines or the talent in using the Koikatsu character creator (unless you're just copy/pasting characters).
There are a lot of things that can go wrong, from writers block, to spaghetti code to burnout and more.
It just gets frustrating for users to see the game get updated every week or two only to see "Fixed two or three bugs" while having a pretty hefty content and story drought aside from "two new things with random girl #3" every couple updates, especially when the game got marketed/popular because it had more story than "You are a guy living alone with a group of girls, father figure mysteriously died/left what are you going to do now?"