Presumably even for that tiny fraction of people who buy a dishwasher right after buying a dishwasher there must be a limit to how many times they will repeat the cycle, otherwise ... well, we can imagine the planet Earth completely covered in dishwashers and somewhere under the mass of white cubes, a constant mouse clicking sound and a cry of anguish... Must. BUY. M O R E <clickclickclickclick>.
Well my girlfriend just bought a laptop, it was broken, she returned it, she bought a different laptop, again broken, and now bought a third one. Looking at how many products are DOA nowadays, it might be that a person that just bought something is more likely to buy it again than the average person.
Also in general I've noticed there are a lot of people that return online purchases a lot, even the non broken ones, since you can't determine if the clothing fits, if the colors really look good, if it has a good texture, from pictures and descriptions online.
They may not be good customers, but Google probably gets money per purchase, not for customer quality.
