Looks like they already have Amazon as a merchant!. See the image on their frontpage:

Surely they wouldn't display a mockup with the Amazon Echo on it if they didn't get the agreement from Amazon yet. Because to insinuate that without consent would be quite unprofessional (and unlawful), especially during a critical time as an ICO.
I am not sure about that, I think they would have announced something huge lime Amazon instead of just a picture.
It can be a stock picture or something like that.