In order to form a legally binding contract it is necessary that both parties provide valuable consideration.
Is the provision by a user on this (or other Stack Exchange sites) of a question, answer or comment "valuable consideration" sufficient to form a contract?
Yes. There's no requirement that the consideration be objectively valuable, as there's no real standard for value; as long as there is some consideration, it can be offered for a contract.
The peppercorn rule states that nominal consideration is sufficient to constitute consideration for the purposes of establishing a contract. Even if later, we decide that the comments or posts are no longer desired, it does not cease to be good consideration.
