I buy Gilette Good News razors...have been for years. My dad uses them, so they were the first ones I tried.
Duane Reade knows this, because I use their loyalty card, so Gilette bought the opportunity to send me a free Fusion five blade razor.
If it works, both companies will know about it.
They didn't ask to use my data, but I'm glad they did. Next time I shave my head, I'll let you know how it goes.