Naver Webtoon, for one, has rolled out an in-house tool named Toon Radar that embeds invisible watermarks in each chapter. When a pirated copy turns up online, the watermark allows the company to trace it back to the specific account that downloaded it.



Yep. You’ll need 3 accounts, to decipher the canary watermark, and implement countermeasures.
Some teams already do.
But, they still use FashCorp.😒