I don't open most emails that come to my inbox, as I give away my email all the time to try to win myself trips (which I have yet to win), so I am really a detriment to most company's open rates. One company that I do value greatly and open almost (if not all) emails they've ever sent me, and that's Stitch Fix, the company that sends you 5 pieces of clothes for $20, then if you keep any of them, you get that $20 toward the purchase.