I believe the lawsuit against the Yahoo mail data breach recently failed. Oath, the new name Verizon gave to the shell company over Yahoo and AOL has put up a new user agreement telling you that they are scanning your emails for direct targeted advertising and other data analysis. There appears to be no opt out options.
newbielink:https://www.extremetech.com/internet/267534-yahoo-aol-email-now-scanned-for-targeted-advertising [nonactive]