No and no. Most buy the data from one of a bunch of vendors (like https://www.factual.com/ https://www.factual.com/, https://developer.foursquare.com/comparison

No and no. Most buy the data from one of a bunch of vendors (like https://www.factual.com/ https://www.factual.com/, https://developer.foursquare.com/comparison https://developer.foursquare.com/comparison, http://thewebminer.com/geo http://thewebminer.com/geo, and a bunch of smaller list providers), scrape it from other consumer sites (at least when they’re small), or wait for users to submit the location in order to write the first review (Yelp does some of this). There are some state-specific data sources, like https://catalog.data.gov/dataset/retail-food-stores https://catalog.data.gov/dataset/retail-food-stores. Most food licensing is at the county level, though, so there’s not a single government-maintained nationwide data source.