Hi Jędrzej,
I'm an Outreach Specialist for G2 Crowd, a user review site for business software. I came across your profile on GitHub when I was searching for Python developers and I'm curious whether you could share a little of your expertise.
We're looking to increase the number of reviews we have on our site for several developer tools so we're sending out Amazon gift cards in exchange for software reviews. The gift cards range from $10 to $25 per review.
You can see what software we're looking for reviews for and how much we're paying for them here.