Out of Band - in this case some form of contact outside of Discord.

I had a company I was doing business with reject a valid email address of mine because it contained a “.” character in it. I got an error message about this being invalid email address to use. My “first.last@emailprovider.com” address had no problems sending/receiving emails with anyone else.

There should be some simplified standard way to identify what combination of email configuration is/isn’t supported by companies and email providers. This can also future proof against future changes in email configuration changing over time due to the ongoing fight against spam.

There was a recent study done by the University of Cambridge which analyzed the black market for fake accounts across various platforms in multiple countries. They found there was a correlation with the price of these accounts and ease/difficulty in setting up a SIM farm for that country.

Snippets from https://www.cam.ac.uk/stories/price-bot-army-global-index

“One SIM card can be used for hundreds of different platforms,” said Dek. “Vendors recoup SIM costs by selling high-demand verifications for apps like Facebook and Telegram, then profit from the long tail of other platforms.”

…

A new analysis using twelve months of COTSI data, published in the journal Science, shows that verifying fake accounts for use in the US and UK is almost as cheap as in Russia, while Japan and Australia have high prices due to SIM costs and photo ID rules.

So the likely outcome of this Korean effort will be to increase the costs for fake accounts but not to entirely eliminate them. With the extra risk of another place for sensitive data to be leaked.

The name prometheus is already in use by an open source monitoring project:

https://prometheus.io/

They are both in the computer field so there is some chance for confusion. Especially if the Prometheus monitoring project has some AI capabilities then that would strengthen the case for a trademark naming conflict.

Apple Inc, the computer company, had to settle and pay Apple Corps (the Beatles record label) money to settle trademark rights for the Apple name when Apple got into music business:

https://en.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer