This is an inevitable side effect of people's tendencies to over-subscribe to information sources. Once it's normal to try and follow 200+ people on Twitter, you're in need of an algorithm to prioritise content, and from there it's an easy side-step to inserting other content you haven't asked for.
Unfortunately even when you don't follow 200 people on Twitter, you're still subject to the same design principles.
Unfortunately even when you don't follow 200 people on Twitter, you're still subject to the same design principles.