I immediately jumped to “why don’t we just compress them?” and it turns out I was wrong. The author is using the WOFF format (https://en.wikipedia.org/wiki/Web_

I immediately jumped to “why don’t we just compress them?” and it turns out I was wrong. The author is using the WOFF format (https://en.wikipedia.org/wiki/Web_Open_Font_Format https://en.wikipedia.org/wiki/Web_Open_Font_Format) which is already compressed with zlib using a special encoding. Serving them gzipped is unnecessary.