I have to imagine that a big part of any solution to review gaming and bot spam is data diversity. eg: whether the submitter has been within X meters of the thing they're reviewing in the last Y days.
Google seems to have done a good job with review spam on Google Maps, better than their job with SEO spam and malicious search results, and deep+diverse datasets are effectively Alphabet's (not just Google's) entire business.
Yelp would have a very hard time getting to know as much about review submitters, an open data platform would have a hard time gathering even what Yelp already collects.
Google seems to have done a good job with review spam on Google Maps, better than their job with SEO spam and malicious search results, and deep+diverse datasets are effectively Alphabet's (not just Google's) entire business.
Yelp would have a very hard time getting to know as much about review submitters, an open data platform would have a hard time gathering even what Yelp already collects.