Using the 1st party cookie as 3rd party cookie will blocked?

[verygooooood]

I working on the adTech company,
I have a question about using 1st party cookie.

Some company using 1st party cookie like this:

1. User accesses media.com
2. For agree 'collection cookie', Users are moving to ad.com's privacy policy page
3. ad.com reads the user id cookie. if user id cookie is not available, ad.com create cookie (1st party cookie)
4. When redirect media.com, ad.com will send cookie information as parameter
5. media.com does not have cookie, will generate. (1st party cookie)

I think this seems like 3rd party cookie, but it works well.
It there any plans to block this kind of stuff?

[edward-grolsh]

if your question is relevant, read this issue:
privacycg/proposals#6