Case in point, I tried to log into Patreon earlier today, they insisted on sending a code, and it never arrived. I tried several times, no email. I have a record of every email sent to my address for the past several years regardless of spam status so I can be 100% positive they simply never sent it.
In the end I had to give up. I can't log into Patreon today, because of their insistence on sending me an email even though I'm logging in from a computer I've used many times before.