They don’t know you purchased it because it’s not commonly shared to ad networks unless they are making cohorts but that is usually done at the product category

They don’t know you purchased it because it’s not commonly shared to ad networks unless they are making cohorts but that is usually done at the product category level. There are many success stories with ads. I’ve been involved with two exits that is all attributed to digital advertising. No where else do you get a ROAS in the double digits. Here is a good example of the difference. When I worked for a challenger bank. We paid under $75 per signup and $10 per app install. Chase and BOA pays $1200 per new customer in marketing expenses using traditional marketing channels.