s/offer new services to users/increase revenue per user/
Once you've reached the levels of market saturation that Facebook has the only way to grow is value per-user, specifically in 1st world countries where there's actual value to be had.
> One large U.S. bank pulled away from talks due to privacy concerns, some of the people said.
Good for them. I wish I knew which one.
> Banks face pressure to build relationships with big online platforms, which reach billions of users and drive a growing share of commerce. They also are trying to reach more users digitally. Many struggle to gain traction in mobile payments.
That's an industry problem, not an individual bank problem. Also, credit cards are already very convenient and near universally accepted. It's hard to compete with that. Only the uninformed would use a different payment technologies with less convenience and weaker chargeback/fraud guarantees.
> Bank executives are worried about the breadth of information being sought, even if it means not being available on certain platforms that their customers use. It is unclear whether bank customers would need to opt-in to the proposed Facebook services or what other privacy protections might be offered.
It's unclear to me what segment of bank customers would knowingly agree to anything remotely close to this.