I once managed to use a EULA in reverse.
I purchased MacOS 8.1 from the (then) only Apple Store, meaning the one at Apple HQ. Then I found out I could upgrade to it for free 'cause my computer was new. So I went to return it. They had signs there saying they didn't take returns. So I told the sales droid that, since they wouldn't honor their license, I would feel free to distribute their software as I wished.
Oh, they didn't like that at ALL! Nope. Too bad. They had the choice of accepting the return, or violating their own EULA, which said that if I didn't accept the license, I could return the product for a full refund. Accept it and refund the money, or the EULA is DEAD and I can do whatever I want with the product.

I got my money, you bet.
OTOH, I don't know what happened internally
afterwards...