The original post was about the use of verbs.

> it should not be legal for the product page to say “purchase” or “buy” when [...]

The use of "buy" and "purchase" were never restricted to ownership or unlimited rights, we buy licenses, usage rights, priority tokens, all sorts of lottery tickets and weirder abstractions every day.

GP probably wants digital movies to have a specific purchase model, but the discussion has to be about the model, not the vocabulary. Right now I actually have no idea what they'd be willing to accept as a middle ground to rights management.