New ask Hacker News story: Ask HN: How prevalent is non-cookie based web tracking today?

Ask HN: How prevalent is non-cookie based web tracking today?
2 by ryeguy_24 | 0 comments on Hacker News.
I just started reading about things like Header Enhancement and SuperCookies and find them to be quite egregious. Does anyone know how much of this activity is being used by big known companies? For example, I just found out that my account settings at Verizon Wireless were allowing them to use Header Enhancement (UIDH) adding a unique identifier on every http request I sent. So, if I log in to a site, they can associate the UIDH with my account so next time I’m in browser incognito mode, they already know who I am (or have a good guess).