This vending company gets all the benefit from your purchase, you just end up being the advertiser for their company. I bought one for my bar in hopes of getting people to use cabs more often and discourage drinking and driving.
First of all, I paid $15,000 for the breathalyzer after tax and all the ridiculous fees they charge. After I installed I have noticed about this device, however, is not taken seriously. Not a whole lot of my customers pay attention to it, and I cannot make it mandatory.
After one month of use, you are supposed to be able to take the money out of it for yourself. Well that is what the company advertises, but they demand a portion of what you make. The return on this thing is not at all worth it. I am never going to make my money back on it.