It's actually mentioned in the original article:

> Side note: The potentially most extensive research on the problem of programmatically unblurring mosaic'ed regions from videos was done by Japanese Adult Video enthusiasts. Javplayer automatically detects blurred regions and performs upscaling via TecoGAN, and another person spent months improving their custom GAN that was trained with leaked videos (search for "De-Mosaic JAV with AI, Deep Learning and Adversarial Networks").

Deblurred porn (aka "Decensored") has left the realm of jokes a while ago, that stuff is already out in the wild on your average porn site.