Keep an eye on, how things develop for the similar blocked bank site issue:
-Blocked Sites that were previously accessible
Re some of your thoughts, I would not be surprised by:
A) “an advertising syndicate” paying banks to display ads to — ‘securely signed-in bank account customers’ who have strong expectations of privacy during such customer visits — and
B) the customer is required by the bank’s online access strategy: to significantly reduce his/her computing device’s privacy and security protection, in order to i) get, then ii) maintain the secure session - such that
C) the customer is held hostage to the third party: “advertising syndicate” . . . and unable to conduct tradtional, expected, private business - unless willing to abandon security precautions.
That is, for some banks, the situation may be.