When Blythe and her partners started Lula's Apothecary, the best vegan ice cream stand in this hemisphere, they didn't have enough money to afford the letters to put "Dairy free" on the sign in their window. They couldn't even afford "vegan." So the signage says nothing about what they don't put in their ice cream.
What they discovered was that word among the tribe of vegans in the East Village of New York City (an even bigger group than you might imagine) spread fast. The product was remarkable enough that just a few happy customers were enough to spread the word.
The other thing they discovered is that non-vegans were willing to walk on in if the place looked cool enough. In fact, the lack of ingredient-declaration on their window actually helped them reach out to people who might have been scared away at the lack of milk.
Ink on the website is free, so they use the v-word there, but even though they can now afford it, the window is still proudly mute on their rigor regarding ingredients. No sense scaring away customers who don't care (and the customers who do care probably heard the news from their friends in advance.)