I haven’t seen this mentioned (sorry if it was and I missed it), but I want to question rule 2a:
Comics should be a full story, from start to finish, in one post.
Even in the newspaper days, it was common for comic strips to have ongoing plots, with each day’s strip presenting the next part in the story (with the plot usually starting on Monday and being resolved by week’s end, although some were ongoing serials, iirc Dick Tracy was like this). So the way this rule reads, it sounds like you would need to publish all strips from the same storyline together.
I think the rule is intended to prevent someone from breaking up comics that were initially presented together and intended to be read in one chunk, or otherwise truncating a comic (e.g. the meme version of “this is fine”). If that’s the case, it’s a reasonable expectation, but the current wording is unclear. It’s hard to recommend alternative text since so many exceptions exist (what if the panels were originally posted one at a time? what about bonus panels? What if the bonus panel was only published to patreons? What if the strip was reformatted from a graphic novel for mobile-friendly re-publication? etc etc.) But maybe something like this would work: comics should be posted in their original format (e.g. multi-panel strips should not be split up). But this is already covered somewhat by rule 4a: “Comics should […] be unmodified.” So maybe rule 2a is unneeded and only causes unnecessary confusion?
The issue I’m raising here is that (again using an example from the newspaper days) you can have a singular strip that’s “complete,” with its own setup and punchline, that’s still part of an overarching story.
Imagine, say, Garfield, where on Monday Jon takes Garfield to the vet, Tuesday through Friday’s strips take place during said vet visit (each strip featuring its own joke that could be understood on its own, but is enhanced by the context provided by the other strips that week), and then on Saturday Jon takes Garfield home, ending the vet visit saga. Posting the “complete story” would require posting all six comic strips together, even though they were published separately and (more often than not) are still understandable (and hopefully funny) even without having read the other five strips that constitute the “complete story.”