>Don’t share it publicly with no viewing restrictions, yes.
They did share it with legal restrictions (copyright) and everyone is already bound by the TOS (law) so there is no need to sign. Viewing is fine, resale is not.
Do you think there is something special about the internet that changes this? Dont let anyone read read copies of your book if you wont want them to sell copies of it? Dont let people listen to your music if you dont want them to be able to resell it?