This isn't a stitch or a key visual, that album is full of screenshots. One of them even has the video player out.
so i decided to post it because the video player is coming from inside the house the anime. post #10526045 is original btw
this one is also an official stitch btw. the admin said in forum #350732 that official stitches are ok because you can't get them from the anime. this one is literally impossible because the camera trembles and doesn't show the corners
i don't think this is a paid reward. like, i don't think they made the lower resolution a freebie and sold higher resolution stitches. because some of the samples (but not this one) can be found with the large resolution on bugbug.news.
basically i'm pretty sure that the ehg gallery is just sample images from a shopping page or news page with promotional images that happened to have the best resolution/quality. i searched around but i can't find any shopping page at this time with the same images. i assume that getchu/melonbooks or some other site had the high resolution images before and they started using lower quality images later so ehg ended up archiving the best ones
i had the choice to upload the lower quality images from lune-soft/melonsbooks/getchu/bugbug.news or upload the higher quality images from ehg. since this doesn't seem to be a paid reward i thought it was fine to upload it from ehg.
the admin said in forum #350732 that official stitches are ok because you can't get them from the anime
No, I said there's some cases where stitched stuff may be allowed when posted by first-party sources and be of unusual quality. This is just a random anime screenshot.