Thanks!

A big reason for me is that people can tell who the source is more easily, instead of seeing a generic Yahoo link. If someone is blocking or flagging a particular domain through their app / front-end, then it won't work for a yahoo link.

Also while I don't think Yahoo is doing something illegal, my gut says that these articles are harming the smaller news orgs. When Yahoo/MSN publishes the full article, the user likely doesn't notice who the actual news org is, likely doesn't go to the real news orgs website, the news org has a harder time building a brand / reputation, and over time they might become even more dependent on Yahoo to stay afloat. A lot of the time when I look up a story, the yahoo page ranks above the actual original source, and that feels wrong to me