IMHO, that kind of thing is a
contract, not a copyright license. And a contract is only valid if certain conditions are fulfilled, like if you signed it, if both parties are actually aware that a contract has been established, etc. (Exact conditions vary with jurisdiction.)
The main point is, you can’t be party (and bound) to a contract if you only downloaded something without the direct knowledge of the provider.
EDIT: To clarify: You are still always bound by copyright law, and always need a license to distribute. If you don’t fulfill the terms of a license you were given, then you don’t have permission to distribute, and are violating copyright if you do.
