This is the final question for me.
You also suggest in your book that the problems in terms of election interference could have started around the time that certain advertising tools, such as lookalike audiences, were launched on the platform. I'd be interested to hear if you have anything more to say about that.
Also, do you believe that some of these targeting tools—as I think Professor Zuboff suggested as well—should be banned from digital advertising? Maybe you shouldn't be able to use lookalike audiences. Indeed, in the U.K., the information commissioner has already questioned whether they're legal under GDPR.