i would argue that having any meta-progression isn’t really a useful distinction. i think it’s much more useful to draw the distinction between meta-progression as a means of tutorialization (unlocking new items or characters, ala slay the spire and balatro) vs meta-progression as a difficulty affordance (like the permanent upgrades of hades)

also, for complex societal reasons, lesbians just tend to like things where carabiners are used, such as bouldering. based on that, carabiners have then used by some to signal that they’re lesbian (i haven’t heard of anyone using it to signal availability, that seems like it would lead to confusion very easily). important to keep in mind that carabiners are still worn primarily for their function for most people, including lesbians (that’s how it caught on)

obligatory disclaimer that i am not a lawyer and this isn’t legal advice.

legal answer:
i think distributing a song in full on your blog is pretty unambiguously copyright infringement. i think having select snippets that you highlight and talk about would be fine though, as that would likely fall under using the work for critisism. the general rule for fair use is that your work should not replace or supersede the original (which uploading the song in full could). if you absolutely need the songs to be accessible in full, you would probably need to link to something like a streaming service. also be aware that things like album covers might be considered their own works under their own copyright, so reproducing that without critique could also constitue infringement.

practical answer:
i don’t think there are scrapers on the general internet looking for copyrighted content so if you’re sufficiently small and/or the artists are sufficiently lenient you’ll probably be fine, and at worst you’ll get a cease and desist and take down the tracks they complain about