I often abandon the checkout because I am not fully committed to buying at that moment in time. I'll often return and complete the purchase a day or two later

I often abandon the checkout because I am not fully committed to buying at that moment in time. I'll often return and complete the purchase a day or two later once I have become commited. There is an entire industry built around the idea that their solution is what made this happen. Problem being, it's really hard to prove it didn't.