Post Purchase Upsell Abakira

Show your buyers a one-click offer right after they pay — added to the order they just placed, on the same card, with no second checkout.

One click, same order. The offer is added to the order your buyer just paid for — no new order, no re-entered payment.
A funnel with a downsell. Up to three offers in a row; the one that follows a decline is the downsell.
Honest about eligibility. See which orders can actually receive an offer, and never any third-party ads.