[seiji]

I think it's a fair point that these companies aren't building a sharing economy.

That's the point. They're directly manipulating gullible people into thinking they're "sharing" and "doing good" when in reality the entire mission is to sign up more people so sites can take their 30% cut of actual work happening (then, if reported properly, taxes take 50% of the 70% paid out to the user, so the user is left with... not much).