

In a sense, you are hosting the content. You’re retaining a copy (so long as the window is open) and constantly attempting to spread it. It’s literally built on bittorrent protocols if I remember correctly, and it’s already very well established that you can be held responsible for seeding copyright infringing material, so I see no reason at all they’d give you a pass for CP instead. You may not intend to, but remember, my example was someone who looks of age but is not.
Yes, it did eliminate competition. They’re no longer competition once Microsoft buys them. They’re employees, possibly if a subsidiary, who contribute to Microsoft’s profits.