The BBC reports that a full page advertisement appearing in The New York Times, which included an actual tweet, raises copyright concerns regarding the reprinting of tweets for such purposes.

Of interest here is the convergence of copyright, advertising and contract law. Namely, Scott’s ownership of his tweet, the use of his tweet as an endorsement for a product and Twitter’s apparent prohibition against using tweets in ads without the user’s permission. With respect to Twitter’s own rules, it states that one must get the user’s permission before, among other things, “creating an advertisement that implies the sponsorship or endorsement on behalf of the user.”
While it does not appear as though Scott will be taking any action other than registering his annoyance with the film promoter’s actions, the incident does serve as a reminder that, when using content found on social media, one must be careful to consider both the intellectual property rights of the creator as well as the terms and conditions of the social media site itself.
You can read A.O. Scott's piece on the episode here.