Google Maps does allow any user to submit edit request for place details (opening hours etc) and flag suspect entries. I guess one could be upset about this attempt to get users to work for free, but personally I don’t consider exploitative because (a) verifying local business is actually far easier for local people compared to anyone Google could hire and (b) Google Maps is such a useful product that the distinction to, for example, Wikipedia is less obvious than the simple for-profit/non-profit designation makes it out to be.