Yes. I use one for https://😁.to and we also have https://🚧.to for WIP.
Overall I would recommend using them only as a redirection URL (like 🚧.to), or when standing out outweigh the cons (e.g. for silly side projects).
Agree with Marc's overall conclusion. Another con is that you can't share emoji domains on Facebook (doesn't recognise as a URL).
Agree with all points as well.
One thing that is a little unknown but good to be aware of: On windows, one can use the "windows key + dot" to make the emoji pop-up appear.
On Mac it's CTRL+CMD+space😀
This can be good in marketing. But it is better to have the main domain of ordinary letters for SEO and normals.
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