That is, once the band sign it, they are under obligation to conclude a deal with the label. If the label presents them with a contract that the band don't want to sign, all the label has to do is wait. There are a hundred other bands willing to sign the exact same contract, so the label is in a position of strength.
These letters never have any term of expiration, so the band remain bound by the deal memo until a contract is signed, no matter how long that takes. The band cannot sign to another label or even put out its own material unless they are released from their agreement, which never happens. Make no mistake about it: once a band has signed a letter of intent, they will either eventually sign a contract that suits the label or they will be destroyed.
major labels: the problem with music