One of the ironies of these things is that they tend to map to a specific e-mail address, whereas the more paranoid of us who'd want to pay for a service like that tend to have different addresses, either entirely or something like Gmail with +filters.
HIBP supports domain searches[^1] at least, but part of the problem is also how we keep trying to reinvent the e-mail system to not fall prey to this, much how Fastmail have Masked Emails, and Apple have Hide My Email.
In a sense, it sounds like the advice of the services is less subscribing to them than trying not to have a few e-mails that map to your personal identity.