My grandma already has trouble finding characters like # on her keyboard, I can't wait till I have to spend time on the phone with her guiding her to the emoji she needs.
Does anyone know what the state is of screen readers, braille readers, and other accessibility tools when it comes to emoji?
I guess if you only enter codes inside your app and you build an emoji-keyboard into the app it might work... ?
Most emojis aren't even visible on Windows 7.
Most apps let you message or mail a referral link to a friend.
Or simply download the app and click again.
I'm not saying not to have user-readable ref codes (though emojis are a terrible choice -- you can't read them aloud), I'm saying make typing them the very rare case.