The experience just sucks, it's a glorified ChatGPT wrapper with all the "As an AI language model..." warts. The stilted mechanical speech of ChatGPT does not resonate with the snapchat user demographic. Snapchat is a wild place, 80% of the real conversations on that platform would be flagged in red TOS violation text were it pasted into ChatGPT.
The "As an AI language model" is a feature not a bug. There was a story on HN recently about this string showing up everywhere in Amazon reviews. If it makes spotting generated reviewers easier I'm all for it.
First company to ship an AI without the "As an AI language model" cruft that you can actually talk any subject to no matter how bad is going to eat up a large part of the market, especially the younger market. Snapchat missed their chance here and shipping something that goes against what OpenAI consider best practices would have resonated better with their audience (Considering their app was essentially a sexting app at one point).
Should have taken the same approach as early YouTube, Twitter and Snapchat where the content that originally popularized those platforms was edgier and more offensive than is allowed on them today, then fixed it later once they have the users.