Services like DeepSeek have an email domain whitelist rather than blacklist. So creating your own domain just guarantees a lockout

That's nonsense. I have a DeepSeek account, of the form ai+deepseek@mydomain.com.

	▲	LoganDark 2 hours ago \| parent [-]
		DeepSeek didn't always have a whitelist. At some point they went crazy due to spam, started requiring Chinese phone numbers only, and then loosened it to an email domain whitelist. (IIRC) If you try to sign up with a domain they don't support, they tell you something like "please use a popular email provider like gmail"