Let's make a common example:
www.example.com is the main website of a company, then they have
blog.example.com that is the company's blog.
It's important to note that the same organization is behind both websites and is the unique owner of the first+second level domain name
The "blog" website could have been incorporated into the main website:
But this time this is not the case. There are many (valid) reasons to split a site via third-level domain names, as in the example above where the blog site is separated from the main site.
And more important (in order to avoid annoying the user): is it licit that when the user give consent on one web site it implicitly give consent to the other site?
Taking the initial example the user go to
Then the user see the link "Visit our blog", navigates to the website's blog landing to
Is it possibile to avoid displaying a banner again?