Comment: Indeed, consider... (Score 1) 344
Consider all the effort it takes to design systems like this, to hire employees to use and maintain them, to purchase the equipment, to pay for data centers, etc.
The answer is, not much at all.
Computing power and disk are cheap. This isn't even a complex problem. The per-item costs of a system like this are probably on the order of hundredths of a cent.
You've already got to track all your products for inventory and revenue tracking purposes; attaching a "who bought this" token is a tiny addition once the rest of that is already in place.