This is the Selectwin checkout — the page where the stores that use us get paid by Pix, card and bank slip, each one under its own brand.
Use the full link the seller sent you: it ends with an order code. This address on its own does not open any purchase.
All three on the same page — no hopping to another site, no filling everything in again.
Recurring billing with a portal where the subscriber changes the card and cancels on their own.
Colors, logo, language and a custom domain: the buyer never feels moved somewhere else.