Would this be considered a "hiring" platform or a "gig" platform?
It's more of a gig platform imho. You are not really hiring, just buying their "product"
If you're really good at sth I don't see why you wouldn't be able to live on that.
Well, there are a lot of things you could be good at that are really not profitable. I would love that everybody can make a living doing what they love, but that's just not realistic.