Scammers are sending me geeksquad invoice emails every week. Scammers sent fake invoices to GOOG and META and receive 100m for it [1]. This feels no different, just scan for sites using your font and send invoices frequently whether they have a license or not. It's a very hacker/scammer type of approach to making money, or I guess you could call it a private equity font-industry-vertical 10x secret sauce.
https://www.npr.org/2019/03/25/706715377/man-pleads-guilty-t...