So you just printed someone else's work on paper and decided to sell it? Come on.
.edit: thought I'd throw it to imgur to help you guys get to your "risky click of the day" quota.
So now I'm wondering, aren't all these icon designs intellectual property of Apple?
If the creators of this poster didn't license these icons from Apple, aren't they violating copyright law by selling this poster?
I'm especially curious about this as the top post right now is about a company using a font on products without licensing it properly. Reading that post, it seems to me like using the Apple Color Emoji font without licensing is the exact same issue.
I'm not sure at all about Helvetica, as it's a system typeface that comes licensed with my OS. However, if I were on Windows I do think I would still have to buy Helvetica, and with that I would be paying to be able to use it on posters.
But looking at it from this point of view, by buying a device with OSX Apple grants you all the rights to use the emoji they designed commercially too.
Then again, in the example you linked the icons are not only used as a typeface, but they are images. PNG icons designed by Apple. Even if you are allowed to use them as a typecase anywhere, they're not using it as a typeface, but as seperate icons. I was wondering about this a few weeks back too when using gemoji. The license for that project isn't really clear either.
edit: The article you linked them actually clarifies that the Apple Emoji are PNG images embedded into the font. Does that still make it "just a typeface"?
No, if you want to print and sell a poster in any typeface, you need to buy the license for that typeface.
See the license terms here for example (#13 "Definitions"): https://www.linotype.com/2061-28225/font-software-end-user-license-agreement.html
For open source emoji, there is http://emojione.com/