@paintedsky I had looked into it when my adblocker stopped working a few years back.
They had literally a set of DIVs with the individual letters of SPONSORED in them, with randomly generated, but hidden, letters. Which weren't 'hidden' or 'display:none', no, they were offset vertically by -100px.
How did I get around it? I targeted all the parent DIVs, grabbed the text of it's children, and saw if they could make the word 'sponsored' out of it.