[kuzee]

I think they're justified to make this clearly flagged (sent out emails), created with some of the leading privacy researchers, and provide an explicit opt-out, and in the service of revealing racism and discrimination on the platform. I got an email, read it, decided I didnt want to be involved, and decided to opt-out. Glad they were transparent and gave advance notice, not sure what else is reasonable to expect.

[hokumguru]

Not everybody will see that email though and they are probably relying on that. I am sure, given the choice to opt in, most users would not (regardless of the cause) - Similar to Apples new anti-tracking in iOS 14

Few people just opt in to having their rights violated

[Lio]

At this point in time I'd say that opt-out is a dark pattern.

It's really only done because they know few people will voluntarily opt-in to something like tracking or profiling.

Given the usual "Your privacy is important to us" guff this makes their privacy terms look even shadier.