Daas Yochid,
If they demand your first born, you can say that it wasn’t reasonable to expect that condition. If they demand that you not give someone else a free copy, you can’t honestly say that you didn’t expect that condition.
1) a. Where in halacha is there a difference between reasonable and unreasonable? b. IF there is, who is to say asking for your real estate in return is unreasonable?
And by now, you know what it says inside.
2) I may know. Many many people do not. Many people bought the CD and still never realized it said anything about a rental agreement inside.
Regarding your other point, which, I believe, was canine’s point, if you violated the agreement, why should they have to give you your money back.
3) I’m not asking how either of us feel about it. I am asking what strict halacha has to say about it. In halacha, the aggrieved parties remedy for breach of contract, is to demand to reverse the original contract — return the item, get back your money.