Because she would have to move into a smaller house.
or
1,000,001: One to change the bulb and 1,000,000 to rebuild civilization to the point where they need light bulbs again.
or
They screw millions of bulbs every day, but when it comes to your bulbs, there's no record.
or
The owner got tired of the (w)hole business!
or
Because pepper makes them sneeze
or