Equifax has the clause for opting out of arbitration, but Trusted ID Premier's Terms of Use doesn't have it. The enrollment site I've seen is owned by Trusted ID Premier, and it's arguably deceptive that Equifax structured the site as a bat-and-switch to see if their shitstorm exposed you.
Heck, they may have even planned a PR push around telling news outlets to refer readers to that site, omitting that using trustedidpremier.com means that you agree to a ToU that mentions only waiving the right to participate in class-action suits, but not how to opt-out.