Change tremorhub domain and add magnite domains

[droide13]

Tremorhub seems to be a magnite domain as they say on their oficial page:

As described in our Cookie Platform Policy, our advertising technology operates by using text files called “cookies” that are placed on your device. Some of these cookies include a Digital Identifier. To locate the Digital Identifiers Magnite may process, you can search through your cookies for the cookies named:

“khaos” and “ruid” (set from the rubiconproject.com domain);
“tvid”(set from the tremorhub.com domain);
“ssid” and “sst” (set from the cdn.springserve.com domain)
“ccuid” and “ccsid” (set from the nai-edge.ccgateway.net domain)
“fsk_retargeting”(set from the freeskreen.com domain).

(source: https://www.magnite.com/legal/user-choice-portal/)

I also added the aforementioned domains that appear in their documentation

[droide13]

There's a domain overlap between rubicon and slimcutmedia — freeskreen.com is listed in both.
Freeskreen was acquired by Rubicon Project (now Magnite) in 2018, so the domain belongs under rubicon. However, I'm not sure whether the slimcutmedia entry should be updated, archived, or if freeskreen.com should simply be removed from it.

[philipp-classen]

I can later have a look if there are clashes to be resolve.

But if you find some sources to back it up, it would be very helpful. On a first glance, it is not obvious to me why the domains belong to Rubicon/Magnite. I'm hesitant to make change without having something to point to (unless the domain ownership is trivial, e.g. analytics.tiktok.com belonging to TikTok).

[droide13]

SlimCut Media's acquisition details:
SlimCut Media got acquired by Magniteon Jun 12, 2018.SlimCut Media's acquisition details
(https://tracxn.com/d/companies/magnite/__yGbtWwsgxn3wZB3zj-kFcAI4gu5uJqa0GkBP4iQB0sE) on Jun 12, 2018.

https://tracxn.com/d/companies/slimcutmedia/__glQl6asxjya5iXQJic8Pah9i-pryb1gnW5nQdn2ihSE