I don't think 1 euro or 30 euro per download would make much difference. When you are downloading a paper, you don't know if it's going to be useful to you at a

I don't think 1 euro or 30 euro per download would make much difference. When you are downloading a paper, you don't know if it's going to be useful to you at all. If you work for a company/university, a bulk subscription makes more sense. If you are a student or hobyist, paying 1 euro every time you want to check out a paper is a good enough reason to download it from sci-hub instead.