Yes, the contract is (presumably) enforceable. The reason it matters is that Lexmark has to sue its customers --the ones who signed the contract--in order to e

Yes, the contract is (presumably) enforceable. The reason it matters is that Lexmark has to sue its customers --the ones who signed the contract--in order to enforce a contract right. In the case that the Supreme Court just decided, Lexmark sued its competitors, the cartridge remanufacturers. For Lexmark to sue its customers would be administratively difficult and is also generally not very good PR. So my guess would be Lexmark will never file that lawsuit.