Highly doubt that, and wonder why you'd even think that - it's a pretty big movement with vocal users, submitting a review because you got scammed (which is what happened) is a very low threshold.

You can automate arbitration filings for users just as easily. Can’t wipe away 100k arbitration requests as easily as the same amount of negative reviews.

I’d even contribute financially to have such an app built, because if FINRA and the SEC won't act (no surprise!), citizens can and should.

I highly doubt that. I filed a 1 star review and it literally only took like 30 seconds as you don't have to write anything to rate it.

Got any evidence for that?

Some circumstantial evidence would be the apple app scores not having the same magnitude of response.