I should note, I've noticed that the artist has put these "progress charts/reports" more regularly in the pixiv versions of the images. Would it be worthwhile plugging those in, or just sticking to the ones that are only posted on twitter for now?

Well I'll be. If this is a typical VN, Osanai's route is all but secured now.

Huh, looks like there's dialouge or something on these now.

Dakkan said approximately: more progress charts in pixiv, should these be in?

Uh... maybe ones released from now on, but I don't think it's worth the effort to plug in the previous ones.