You are correct. My understanding was that they ORIGINALLY tried to enforce this deal (cheaper cartridges if you promise not to refill them) as a contract, which was struck down already (though i admit, i am finding it hard to find citations for this right now, i could be wrong).
As a simple contract between two parties, no-resale seems perfectly legitimate (e.g. concert tickets), and i wonder why they didn’t just go with that…
