I was mildly annoyed by the handling of this for domains. I have a personal domain, and now I know that one of the generally service-specific email addresses I've used (most likely with a unique password unless it's Palm levels of old) has been breached with its password. I don't know which one because I don't have a high enough (paid) account.

If I'd realized that jumping through the hoops to get onto the site was just going to tell me I'd need a paid account I'd have saved myself a few minutes. As it was it made the whole experience feel like I fell for a sales email.