Speaking purely hypothetically, if that were to happen, would there be a good, reliable place to look for future updates (places that aren't the online equivalent of Niki's sketchy basement)?
Selebus has repeatedly talked in the Discord about how much he hates the way the yandere archetype is normally written, exaggerated to the point of being nonsensical, and how they're obviously crazypants from the getgo. Yanderes are made over time rather than born that way in his book, and so Chika's possessiveness and occasional hints of capability for violence make me flag her as having that potential after Sensei breaks her heart.
The official itch.io and subscribestar pages should continue to work.
There are two separate outfit systems in the game: there's the invite-over outfits, which you can change at your computer on weekends, which change what outfit girls wear during their sex animations and which are mostly unlocked by reaching high levels of affection or lust, and there's the profile outfit, where you can change what the girl's appearance is in the Main Girls or Side Girls screen when you click into her profile from a dropdown menu. Headpats unlock pajamas for the profile outfit.
SubscribeStar was specifically started in response to certain competitors disallowing such things, so moodle is correct, that should continue to be a source for the foreseeable future even with that content.
As for the archetype, there's really no other way to do it with existing examples, yandere hasn't gotten the same level of development as a trope as the other dere archetypes. Tsundere and kuudere are the most developed with at least two different types each, and I believe there is now a third even for tsundere, but yandere has only ever had one, batshit crazy to a potentially deadly degree and completely infatuated with the love interest in question. There have been variations on the severity, basically how far the yandere is willing to go to achieve her goal, and how the yandere traits manifest, whether from in story events or the yandere starting that way, but there has been no variation that I am aware of as far as how they act. This is what initially tipped me off to Ayane at the beginning up to the first beach event and then to Ami and Noriko as possible yanderes. They almost always start out soft and subtle, obviously with the instability, and then they ramp up their yandere antics over time as other people 'get in the way' or the love interest 'stops loving her' or whatever she sees in that deluded mind (I say she because it is almost always a female who gets this archetype). On occasion, they do start out hard and fast, going from 0 to 100 in a VERY short span of time and leaving a bloodbath in their wake.
That's what makes them yanderes, the term basically translates to lovesick from Japanese to English, so it fits. That's also probably why there's little to no variation, because lovesick isn't a very broad spectrum in the same sense yanderes fit in.
This is also why I don't see Chika as possible, she didn't
start with any sort of instability and she hasn't really
been ramping up her antics to push other girls away at minimum. Ami, however, is a VERY different story in both regards (again I cite the initial invite over event for every girl and her one lust scene in her
maid uniform as evidence). Even Rin is more of a yandere than Chika and Rin isn't really showing yandere traits, only
depression induced tunnel vision and hostility toward anyone she sees as getting in her way, though not in the same way as a yandere, that is more directed at other girls that she thinks are trying to take the love interest from her, not take her from the love interest, while Rin is
more the reverse.