> What used to work really well were Flash cookies. I heard from an adtech company that a patent troll was granted a patent on this (incredible, using an Adobe

> What used to work really well were Flash cookies. I heard from an adtech company that a patent troll was granted a patent on this (incredible, using an Adobe feature as designed wins a patent), and would wait until adtech companies reached a sufficient size before suing. They had a well known reputation of settling for a few million and weren't contested.