What are you actually trying to say with "uploading of a vast majority is prohibited"? I think "massive quantity" or "massive file size" might be the term you were actually thinking of? Not being a wise-ass here. I'm just looking for clarity and understanding.
If size and space use are the issue then why make archives in the first place? We are just duplicating stuff with these compilations that's already on the site, right? And besides, if one archive is 108MB in size then how are we negatively impacting the host site any further by combining two archives as one? The project of building the 26 archives takes up no more space than the 13 double-sized volumes I'm suggesting.
Is it a transfer-speed issue? I could see that being a possible concern, but I have to tell you that it would mean that CB+ still has a limiting concern that most storage sites no longer share. Many pulp scanners are today building monster files in comparison to a little 216MB file like I'm suggesting, and I would guess that you already know this next fact from all of your own works, movielover, that the comic scans are jumping in size too. Gone are the days of people being fully satisfied with 20MB offerings. Bigger dpi counts, bigger file sizes--it's the current trend and it's only going to become more of an issue, not less.