I just fielded another "courtesy call" from a company that wanted me to know how much they value my business. And by the way, did I know about this month's incredible deal ...?
I personally think it's okay for suppliers to inform me from time to time about new products and promotions. But please don't insult me by calling it a courtesy call.
It's a good lesson for all marketers. When you're trying to build a relationship, start by not lying.