Yes, visibility means a lot. It's hard to distinguish no commissions because of poor advertising from no commissions because no one likes your work, and that latter thought is demoralizing.
I think artists maybe think about "the min wage" too much. I mean, min wage is only a legal construct & all it does is say how little a legally-defined employer can pay a legally-defined employee. But the artist is their own employer & employee. And min wage changes arbitrarily; one day it's (e.g.) $7/hr, another day it's twice that - but the art or artist didn't suddenly get twice as good. So, the legal construct & it's arbitrary number don't apply unless you make a personal decision to make it so.
Similarly, folks who (with their own good reasons) come down on "undercharging" (e.g., less than min wage) because it hurts the community may be engaging in shaming without having intended to. I mean, if my art isn't up to the quality of (e.g.) $40 for a colored torso rendering (or maybe I have a Hieronymus Bosch style few like), it seems I'd be setting myself up for disappointment to ask $40 simply because that's what the community says it gets, & I ought to charge, for such renderings.
And then there's the difference between the artist trying to make a professional living (& needs to charge what the market will bear) & the artist who is merely trying to pick up a few bucks with what remains their avocation.
But... all that said... I'm not an artist trying to make a few bucks or trying to make a living, I just think this is such an interesting aspect of the artist life. So take my blather with a grain of salt & shake the dust from your sandals if it offends or makes no sense at all. 