DataDrake Generally when I hear "off-topic", it's a bad thing, as in "this doesn't belong here". But, as you say, these topics do belong here, and are not "off" in their respective category.
Further, one way to interpret "How Do I Linux" is "You don't know anything about Linux". The grammar can almost be construed as mocking the author's intelligence. I appreciate that this isn't at all the intent, and that not all will feel this way, but I think it's worth bringing up.
Recently I asked a question about Spotify, specifically how people are using it on Solus. I self-tagged it as "Off-Topic" and "How Do I Linux", but it felt quite awkward to me. It isn't really Off-Topic even though it's not Solus responsibility, and it's not really about Linux in general. (and I do believe I "know how to Linux", thank you.)
Would it be more clear and encouraging to use:
"Non-Solus"
"General Linux Questions"
"Upstream Software" // or something to that extent
The goal here is to (1) make it easier to find/self-categorize questions, and (2) make it more professional, open and friendly.