I believe they asked things like “Get notified when you appear in your friends photos” or something along those lines. My memory is fuzzy though. Phrasing it like that would probably get more opt-ins. It’s a lot less scary sounding.
Yes, but the other side is true too. For example, if the prompt just said "Allow Facebook to scan all your personal photos and do facial recognition, and also capture some of that data for future use?" then it's not at all clear why they are asking for this. Also it's going to all be "no" from the users.
Much better would be a compromise, that describes both why and what. Though, that will be a lot of text which isn't good either. Hard problem.
In general, when I come across some sort of opt in I get offered a choice between allowing something to work and it not working and having some sort of a sub optimal experience. I can't even try before I buy either because once I have consented, the data/image/whatever is already "released".
Most opt-in choices, unless coerced by laws, will be heavy handed nudges at best.
I'm an IT consultant and stand more of a chance than most at making an informed choice but please don't wave "opt in" as some sort of laundering procedure. I am deliberately juxtaposing with money laundering.
Many of Facebook's "opt-in" things aren't actually consent, so I'm prejudicially wary of any numbers Facebook gives. (I have no insight into this particular case.)
> At the time, more than a third of Facebook’s daily active users had opted in to have their faces recognized by the social network’s system.