I wondered whether How to add custom services to Ubuntu that aren't Canonical's but my own (Cloud service etc)How to add custom services to Ubuntu that aren't Canonical's but my own (Cloud service etc) is off-topic because of "I'm making my own distribution of Ubuntu" in the body of the question.
From Eliah'sEliah's comment, reproduced in part below, I get the impression that questions about existing unofficial derivatives are off-topic (according to the FAQFAQ) but soliciting assistance in making an unofficial derivative is acceptable.
Making unofficial derivatives is not off-topic. (At least, I'm not familiar with any community consensus saying it is, and that wouldn't really make sense, since there's no other community that could give better advice about that.) Questions about existing unofficial derivatives are off-topic. We have questions about remastering, trademark rebranding, and many other elements of creating unofficial derivatives here; I recommend posting on meta before closing this as off topic.
Emphasis added by me
Is there a distinction that should be clearer to people less familiar with the meta aspects of Ask Ubuntu?