scihub.org/donate/ looks scam.
https://sci-hub.tech/donation/ at least has the same bitcoin address as sci-hub.do, but as for PayPal et al... ???
[0] https://en.wikipedia.org/wiki/Sci-Hub
SciHub.org was formed in 2008 and has 50 employees per CrunchBase.
https://www.crunchbase.com/organization/science-hub
Real organization, coincidentally a very similar domain and area of work.
(Currently redirects to https://sci-hub.41610.org/)
https://sci-hub.st
https://sci-hub.se
are the only working domains that have been linked from the official Twitter, VK, or FB accounts.
All other URLs should be considered unofficial or scams.
To be sure try searching for some random paywalled academic paper on their site
[0] https://en.wikipedia.org/wiki/Sci-Hub