[pbhjpbhj]

>after you filter for returns and replacements, that the probability of sequentially buying two of the same vacuum cleaner was effectively zero.

But aren't the returns segment significant? "I bought this vacuum cleaner, returned it because it didn't suck (!); oh and look, this advert said this one has the best suction."?

Also, it seems common amongst some sectors to rebuy: like parents might buy a coat, find it's good, rebuy for the other children. Landlords might update their properties, rebuying items that work well and are robust enough, etc..

?

[mc32]

As a different poster than Parent posted, people are not goldfish. In all those repeat purchase scenarios the buyers know what they bought and can buy again if they so choose (in the near future). If it's six months down the road, I can see maybe this would be useful.