Is there actually any benefits of doing a chick run from Ep9 onwards?
Short Answer: No.
Long Answer: No, but longer.
Also maybe yes, in the future at least.
I have a feeling that side chicks in the later episodes
might prefer a CHICK route. Cindirella (I'm expecting her name to be smt like Sindy) only flirts with you if you don't make out with anything that moves. Nerd chicks like Sally and Karen might require CHICK status to
seal the deal. I'm expecting some more others scenes in the aftermath of the musical event for the profs or whatever it is. Anything that can happen in that event, would probably favor CHICK status of DIK. So
maaaybe, possibly CHICK route can be better for some side-chicks. In the party, unless you're a CHICK, you can't make peace with Kylie & Penny. There might be something there in the future.
I think we'll continue to see some cute little scenes with main LIs as well. If you're not a DIK, MC complements Sage's nails. That's available in Neutral too. But in the future, some of them may be CHICK-exclusive. I mentioned in previous posts that this episode was relatively weaker in terms of variety, this is one of the things that were lacking in this episode too.
All that being said, I doubt that non-CHICK's will get locked up on real scenes–especially on the "others" paths. So I don't think I'll be making any CHICK saves rn. But, you never know.