I believe there are vendors that feel informing their customers might scare them away from making the switch.For "business" reasons is exactly why they should get involved. I don't see the downside.
The thinking is that if the customer is afraid electronic cigarettes might be taken away, why should they start using them.
I'm sure there will be plenty of vendors that feel this way and won't get involved.
I don't care about them though, I just care about reaching the ones that won't think that way.