This is my experience in political science as well.
Poli sci is starting to get some really good repositories of data (replication is something we actually care about), but for a long time common practice has been to post your paper on your own site. Nobody is going to stop you.
These are a number of articles in major journals which if you go through Wiley are closed access, but a quick search will bring it up. The only reason that doesn't happen is the author doesn't want to do it, which is detrimental to them because their research isn't promulgated as easily.
This stuff tends to be working itself out outside of SciHub, it's just the most visible route (probably because the approach is so newsworthy, being illegal and taking on big interests).
Poli sci is starting to get some really good repositories of data (replication is something we actually care about), but for a long time common practice has been to post your paper on your own site. Nobody is going to stop you.
Ex.
https://sites.google.com/site/brynrosenfeld/research
These are a number of articles in major journals which if you go through Wiley are closed access, but a quick search will bring it up. The only reason that doesn't happen is the author doesn't want to do it, which is detrimental to them because their research isn't promulgated as easily.
This stuff tends to be working itself out outside of SciHub, it's just the most visible route (probably because the approach is so newsworthy, being illegal and taking on big interests).