[Political Junkie Too]

It's not clear to me from this article as to whether these are really "repeat customers."

I don't think that recently purchased hybrid cars are ready to be replaced.

I think these are people who purchased hybrid cars who chose not make their second-car purchase a hybrid, too.

People may be thinking that one hybrid car in the family is enough.

-PJ

[Jeff Chandler]

People may be thinking that one hybrid car in the family is enough.

As in, "One hybrid car in the family is enough."

[Only Sane Man]

I don't think that recently purchased hybrid cars are ready to be replaced.

That seems like the most likely interpretation. Usually people who want a second car while the first is still up and running need one economical running-around-town car and one heavy-duty cargo-hauler.