You are free to give away whatever you want so long as it's yours to give away. For example, the ACM has opened up their pubs during this health emergency which is a nice move on their part. Do I think it would have been preferable for the publishers and IA to reach some sort of agreement? Of course. But, much as I'm a fan of the IA, they shouldn't IMO be doing this unilaterally.
Again, libraries are closed. Libraries do this every day. People are locked in their homes with nothing to do, so they opened their archives as a gesture of goodwill and generocity to a nation of people who cannot get books from libraries. While this may not be legal, it is humane. The problem with this country is that the humane thing is often illegal. We cannot give this food to the hungry, we could be liable.
It's honestly what sucks most about this country: if someone is making money on it, everyone else who comes near it is powerless against it.
Yes, they are breaking copyright law. Who gives a flying fuck about copyright law when there are 100,000 dead people and riots in the streets?