According to a DOC report, the 5x online purchase promotion that Citi Prestige launched during the pandemic can be triggered by payments made through Plastiq. Valuing ThankYou Points at 1.2 cents each, even after factoring in Plastiq’s current 2.5% fee (which will later increase to 2.85%), you can still come out about 3.5% ahead. If you have a Prestige card and don’t have much use for the 5x online shopping bonus, this could be worth considering.