Yes, of course its trivial to block. Many already does that.
The name of the domain makes it easy to just block all content from just that domain.
Doesnt matter if they call it ad.name.com or partners.name.com or media.name.com or whatever.name.com
If its all ads from one of the "legit" subdomains, its easy to block just that domain.
If that is hidden behind a URL scheme with www.name.com/ads/ (or /media/ /partners /whatever/ ) its easy to block.
If ads is added bya specific script file that all webpages include - just block that script file.
Blocking ads speed up the browsing. If you never intend to buy from internet-ads anyway and instead
always use consumer compare sites for selecting which product to buy - who needs ads anyway ?