We (along with the review sites) will hold a raffle or offer swag to anyone who leaves a review (positive or negative).
One of our students last year won a gift card from the review site for leaving a review and tweeted “I just got a $50 Amazon gift card for leaving a review for Lambda School” and it turned into a whole thing. We literally weren’t involved in that in any way.
Trying to twist that into “Lambda School pays students to leave reviews” is 100% incorrect.
The thing is, reviews (in general) are usually biased towards the positive. Even more strongly so when you consider that (in the case of a coding bootcamp) you've just spent an enormous amount of time, money and energy there - nobody's going to want to trash it.
I think we'd agree that in the case where someone had a great experience with your school, they'd post a great review, and when someone had a truly terrible experience, they'd probably post a terrible review. But what about when someone has a merely "meh" experience? In that case, someone will likely (with a bit of a push towards the positive) write a simple, positive review. Maybe they thought they'd have learned faster by themselves... but there's a gift card? And my friends will see the review? Hmm... I'll just write something short and positive.
In general, I think there are a lot of things that are a careful balance, easy to tip in one way or another - politics, public opinion, social issues - and reviews are certainly one of these things.
But generally I think it's fair that you should not take code school reviews very seriously.