You have to use the VIP access, described in the link posted in the OP.
“In this sale, each Clever Training (CT) VIP member is given a coupon code (FALLVIP) that’s good for 20% off a single non-sale item including all trainers and most power meters. It doesn’t matter if that item is the Tacx Neo 2 trainer, Wahoo KICKR 2018 trainer or the CLIMB, the PowerTap P2 power meter pedals, the new Polar Vantage series, or Oakley aero helmets. Your choice, but it’s only available to CT VIP members. I explain how to be a VIP Member below.”
The sale is members only, but it’s simple to get started:
- Pick out the item you want to buy and add to cart (see below list as a starting point)
- Add the Clever Training VIP membership to your cart
- Add VIP members-only coupon code (FALLVIP) upon checkout to save 20%.
- Enjoy gadget!