The "conversion of monster parts by minors is 'in principle' prohibited" explains why she's strapped for cash while being such a successful solo Explorer - I hope we get the "real in-world reason" for that, but I suspect it's to prevent kids & teens from going into dungeons trying to get money and getting in over their heads, or something. (Like "stay in school, don't go Exploring" but also for their safety and whatnot.)
But I wonder if her reason for purposefully keeping her viewer count low by exploiting her own speed + the drone cam's limitations has to do with her aunt, as well. Something like she's been told to keep herself an "unknown", for her own safety? Being this powerful while being this sheltered, I could see her aunt worrying about MC being taken advantage of or something, and while she has to do this to survive (though now I'm wondering where Auntie is), but this way she stays "hidden" and thus safe.
Some definite clues that her circumstances are being considered and thought out by the author, and that we're probably just going to get the answers later on in the narrative once Mint builds up more trust with her and "earns" a closer place to her.
Definitely fun, though. A bit of a different take on some established themes, which I will never scoff at. And the TL notes at the end are a nice little addition and bit of extra effort, which I always appreciate.