I think reasoning like this assumes that our potential customers are like us. I look at my inbox vs. my wife's and realize that not everyone dislikes getting tips, newsletters, promos and every other piece of junk mail under the sun. She loves getting that stuff. It's just bytes on the hard drive, and she doesn't care about that. I know I'm leaving money on the table my not having an email campaign, so it's one thing I'm vowing to change. Sure, you might lose a few people, but in the long run you'll gain more.