One thing worth taking into account is the practice of finding people who actually like the product, and then paying them to write an honest review. I find this to be much closer to ethical than paying exclusively for positive reviews to people who may not have ever used the product, but it has a similar net effect of distorting the sentiment by amplifying a subset of opinions, so still not ideal but at least it’s rooted in honesty.

If you haven’t been vocal about your support of products in general, you wouldn’t show up on the radar for these “opportunities.”