Any examples of UK companies using one-click upsells?

Hi

We're just being cautious and trying to do our due diligence with using the one-click upsell process which stores the payment information during a transaction to allow people to add upsells with just the click of a button (the "Upsell form" in Ontrapages / Ontraforms).

Are there any other UK companies out there that anyone can point us to to see that they're implementing it? It would give the directors peace of mind to know that other UK companies are using Ontraport to do it. :)

Thanks!