Bordering off topic, but the smart people realize that you don't need to throw away your blades every time they get dull; that model is only successful because people don't realize you can restore a set of blades to service with a few minutes and some jeans.
So, you could say I've already disrupted it just in my own life, and the wider dissemination of that knowledge would just disrupt it further.
Amuse yourself, I guess...
If you're an intermittent shaver like me or someone with thick hair I bet they suck.
What he and you prove as a point is that to him Costco deal is perfect while your "thick hair" it too thick to save money with Costco. So the Dollar Shave Club will be perfect for you (to save money) and useless to him. Therefore, the DSC will never scale well enough because people like me or OP will never have a thick hair :)
edit I thought you meant "leave the razor a week" but I think you mean leave your beard a week on second reading.
1. Does this work for safety razor blades (e.g. the double bladed type)?
2. How do you do it?microscope before and after pictures here: http://teamdonline.com/technology/extend-life-razor-blades/