I can't even get that far in trying to sign up for Claude. Years ago, I told Constant Contact's (a/k/a Constant Spammer) legal department to block all emails to "animats.com", which was an option hidden away in their terms of service.
Back then, they were just a spam service provider. Now, legit companies use them for "deliverability". Anthropic, which has some kind of co-marketing thing with Constant Contact, seems to use them for verification emails. Signup verification emails can't reach me. So I can't even start sign up.