TA does their own review vetting (of course), but it definitely seems like they're less selective than Yelp. As a result, they don't seem to get badmouthed by b

TA does their own review vetting (of course), but it definitely seems like they're less selective than Yelp. As a result, they don't seem to get badmouthed by businesses as often, but that has downsides, as you point out. In my experience, TA seems to have a larger self-reinforcing effect than Yelp: Top 10 places get more great reviews, stay top 10, even if they're dropping off in relative value or weren't that great to begin with.