Apparently some of the very best-converting ads are repeat sales. Of course it helps if the product is obviously consumable, but I'm told that this counterintuitive strategy actually works well. Maybe it's because they can track conversions but not product returns, so maybe you're searching for a better one after returning the first purchase.

I would be willing to believe that most toilet seats are bought by people that buy toilet seats as part of their job (builders, plumbers and maintenance). They might buy more in a month than you buy in your life.

Follow up ads might be very productive even if you personally get swept into the professional toilet installer ad pipeline inappropriately.

Watch people buy watches.

Camera people buy cameras. Particularly if your talking about lenses, I might buy 3 in a month.