It is good to see that we're getting some evidence that's contrary to accepted wisdom. Not that the evidence would stand up any better to proper scrutiny either.
It's not easy to make the general public accept the benefits of something they think don't need and at the same time is a very niche sort of a service. It will take years before the sentiment around mixers clears up.
A pretty large number of people just can't fathom how important privacy is, otherwise they wouldn't have sold themselves to Facebook and other social media platforms already and therefore think it's normal, unfortunately.
When Libra becomes an actual thing people will regret having been so open to Facebook after getting their payments blocked and account limited in some way. It's going to be the reality of the day.