There's no way to make an account, and there isn't any functionality for payment. There aren't even any Paypal/Patreon accounts or donation links. The info page on the site literally says "judyrecords is a 100% free nationwide search engine".
How do you think this website is monetized in the absence of those things?
Because the website is accessed by Europeans, meaning it is collecting Europeans data (via google analytics). But also because California has CCPA which is more or less equivalent to GDPR (as far as I understand at least. I might be incorrect).
I'm not sure that you understand GDPR fines, the annual revenue is only used as an upper limit for companies with massive revenue.
The service being free doesn't protect you.
> The less severe infringements could result in a fine of _up to €10 million, or 2% of the firm’s worldwide annual revenue_ from the preceding financial year, _whichever amount is higher_.
> The more serious infringements go against the very principles of the right to privacy and the right to be forgotten that are at the heart of the GDPR. These types of infringements could result in a fine of _up to €20 million, or 4% of the firm’s worldwide annual revenue_ from the preceding financial year, _whichever amount is higher_.
It was just an example; similar issues occur under the CCPA and other legislation. (Assuming no user is covered by GDPR, which is likely not the case.)
FWIW: I also prefer Plausible, and have all GA traffic blocked in my hosts file