The first round with the Consumer Financial Protection Bureau concluded rather quickly. Apparently (and understandably) all the CFPB does is forward the complaint to the company for response. I'm sure a lot of complaints happen because people simply aren't able to reach the right person, or perhaps they present facts the company wasn't aware of, or haven't seen the actual document(s) that is relevant.
Chase's response was very bland, it said "you broke the rules so we closed your account."
I filed a "dispute" of Chase's decision, pointing out the estoppel issue and also citing the links to ThePointsGuy's blog. So we will see what happens when someone at CFPB actually reads the complaint and tells either me or Chase "What the f*** were you thinking?"