This is weird... I just went into the Accor Signature page to sign up for the 1-year plan with the 15% discount. I selected the 1-year Absolute plan, clicked "Subscribe", and it took me straight to a page that says "Your Subscription is Confirmed". It doesn't ask me for payment details, no money has been deducted from any of my credit cards, and there's no record of my subscribing in my Accor account or app.
This happens on two different web browsers, on both the English and Portuguese versions of the sign-up pages.
I suppose this is one of the site's many glitches and I should just try again in a few hours?