That's not really true because they used to have the same mail server so if you found one domain, then you could easily find the rest of the domains too.

I wouldn't call it "easily" as you need a way to reverse lookup for all MX hostnames that resolve to a given IP address. Obviously they can rotate the IP address too, to further complicate things.

They use the same IP and their domains are all listed here: https://verifymail.io/domain/carspure.com

I have to admit that they have improved though as earlier they were all using the same MX records, now at least each domain has its own.

I find it amusing that a .org site (temp-mail.org) has ads all over it while a .com site (temporarymail.com) does not, given that .org was mostly used by non-profits while .com is intended for commercial use.

I remember when this was a thing like back in the early 2000s, but nowadays everyone bombards their users with ads regardless of TLD.

Non-profits still have bills to pay...

Kind of compromises the mission alignment and trust though if it's through ads.

It's not 1997 anymore. Anyone can buy any domain name and use it for any purpose. Except .gov and .edu obviously

OpenAI is a non-profit.

(Kinda like a penguin is technically a bird.)