Yup. Reading their post, it appears they didn't want to play the contemporary adtech game because it felt scummy, so they became unprofitable and quit.
The whole ad business reeks of desperation. However, it does pay the bills, so I guess it actually works.
For instance someone googling reviews of Samsung Dryers probably is considering buying a dryer of some kind.
The further you get from that initial intent the less valuable your ads are until they are basically worthless.
what I'd really like to know is whether banners are a worthwhile investment, not if they get clicked on.