Stack Overflow is buying reviews for Teams

It's common practice, their justification sounds legit:

> We sent an email to admins of the Basic tier of our paid product, Stack Overflow for Teams, asking them to review their experience. At the guidance of G2 Crowd, we offered an incentive to our customers in exchange for an honest review. It's common practice to offer an incentive for a review on G2 Crowd, similar to participating in a panel or survey.

Most large SaaS companies do this. It's hard to get enterprise customers to take the time to write a review, but with some incentive...they might. They didn't ask for a good review, they just asked for an honest review and in return you get a gift card. There's nothing unethical about this.