The 0px rule would be in a separate .CSS file. I doubt that bots load .CSS files for .html files, at least I don't remember seeing this in my server logs. And

The 0px rule would be in a separate .CSS file. I doubt that bots load .CSS files for .html files, at least I don't remember seeing this in my server logs. And another "classic" solution is to use white link text on white background, or a font with zero width characters, all stuff which is rather unlikely to be analysed by a scraper interested primarily in text.