Given Equifax is locking access to whether you're a victim behind an agreement that forfeits civil rights to act on that information, this looks like a textbook unconscionable contract.
You find out whether you're affected before you enroll. YOu enter your info, get a result that says "no/maybe/you should enroll right away" and then it shows the button to actually enroll in their service. Until you actually enroll you haven't agreed to the arbitration clause.
Somebody should open a second lawsuit about this. A hack is one thing, but a deliberately evil reaction to it should spell the end of the line for the company.