And those stupid stylised "fonts" that create problems for screenreaders by using obscure Unicode characters.

Are you saying they are adapting them in a kind of cultural adaptation to the ChatGPT outputs, or are you implying the higher likelihood that they sees simply unquestioningly posting/sending AI outputs?

It's the latter. Soo many "official" company communication is "a clown told the AI clown to generate something about the topic". Not even editing anything, just copy paste

What about the possibility that newer versions of GPT models are more likely to use emojis in their responses

I remember going away from youtube for a month right before it added buttons for quick emojis to its app (summer 2022 iirc?)

returning to it getting filled with emojis was bizarre - but it largely went away now