I bought a pair of car sidelight bulbs from a small ecommerce outfit and received multiple emails about special offers and such. Can't remember what the cost wa

I bought a pair of car sidelight bulbs from a small ecommerce outfit and received multiple emails about special offers and such. Can't remember what the cost was but I do remember the postage charge was the biggest part of the transaction. I'm sure the business owner really thought he was promoting his business well but who buys bulbs in such quantities to make this worthwhile?