I received a request recently to review a SAAS product that I have been using and after checking out the review provider in more detail I found there are lots of products that you can review and receive £15-£20 in exchange (per review). I assume there are probably restrictions so I don’t know if it will work for everyone but I have made £60 (GBP) in Amazon vouchers after writing 3 reviews. Just thought I would mention it for anyone looking for some quick cash.
If you scroll through the list it seems to go on forever (I gave up eventually) -
https://reviews.capterra.com/search
Enjoy!