From what I heard, salt is usually packaged with iodine or some substances that prevent clumping that expire over time. So after some time the salt won’t have those anymore, but it should be safe to consume. Salt cannot spoil because bacteria cannot grow in salty places.
Don’t know how plastic containers relate to that sadly.
In what way? I use it from time to time to get movies and series. Is there any downside compared to other methods?
Genuine question, I’m not too familiar with the pirate world beyond pirate bay.