Earlier quoted context omitted.
> Suppose posterous would charge 5$/month for their blog hosting, and still would add the affiliate links, what would it change in your opinion? It is fundamentally different in law as soon as there is consideration in both directions, because then you have the basis of a contract. However, if users aren't paying for the service (or otherwise giving some significant benefit to the service provider) then there is unli…
> IANAL etc., but this is elementary contract law. It's perfectly legal to have a contract where no money changes hands at all. The important part is that there is some kind of agreement between two parties (or more) that is defined in a formal way. Money definitely need not change hands. A 'one way contract' gives consideration to only one party, and in the case of posterous that is definitely not the case, after al…
This is the case in every jurisdiction in the modern world. I don't care what Wikipedia says: if it disagrees with this, literally ten seconds with any qualified lawyer will tell you that it is wrong.