Out of interest, did you rename the font prior to use? I'm curious how they found it.
You can also just stick them in a font-editor and re-export "as your own font" with some minor tweaks. Not that you should, of course.
I did not - I wasn't trying to evade - I was just being lazy.
I do believe whoever the font owners are paying just scrape the HTML and CSS looking for patterns matching their font.
You really should pay, especially for work by small foundries.
Making a typeface takes a tremendous amount of work. The financial upside is extremely hard to justify.
I think non-designers underestimate the amount of effort required by an order of magnitude. I put it in the territory of building indie games. Potentially years of your life go into it, and it's a huge problem if everyone pirates your work.