I've heard that credit card is significantly better than debit card purchases
That would make sense based on what I see in the link I posted above, as they say that buying בהקפה (on credit) isn't מתפיס בקדושת שביעית and they reference [ע”פ דברי הגמ’ בע”ז דף ס”ב ע”ב ובתוס’ שם. רמב”ם פ”ח ה”כ. חזון איש י,יג].
