I can confirm Creative Cloud has added to my /etc/hosts file.

Adobe secretly modifies your hosts file for the stupidest reason: https://www.osnews.com/story/144737/adobe-secretly-modifies-your-hosts-file-for-the-stupidest-reason/

@marcedwards @daringfireball The great irony is that one of the previous ways to Crack Adobe’s Creative Suite Apps was to edit your hosts file so their registration call-home were routed to local host.