Here's a listing of prices of very popular USA made juice companies, compared to new V4L USA made juice. I've left out the names of the companies so that nobody thinks that I'm promoting other business in this subforum.
USA juice vendor #1 - $15.30 per 30ml (does not do blanket discounts). After 2+ years open, finally decided to start doing sample sizes.
USA juice vendor #2 - $16.50 per 30ml (does not do discounts). 10ml is smallest "sample size".
USA juice vendor #3 - $19.99 per 30ml (does not do discounts). 7ml size is $5.99!
USA juice vendor #4 - $21.99 per 30ml (very rarely does discounts of 10%). 6ml size is $4.99!
V4L USA made juice - $19.95 per 30ml (almost ALWAYS has at least a 20%+ discount). Less than a month after release, already have sample sizes in the works. After only a 20% discount, price comes out to $15.96 per 30ml (2nd cheapest regular option)
Postage Price Calculator
According to USPS site, cost of each postcard is .29.
Using bubble mailers, I've gotten bottles from friends for as low as $1.18.
I seriously doubt the post cards cost more than sending sample bottles would have.
Maybe next time you should think about what you are going to say before you stick your foot in your mouth and make judgements about something you obviously know very little about.
PS: By the way, I'm just being frank about it, seeing as there is little point in beating around the bush.