I guess that really only affects people who want their tweets to reach people who don't follow them? Twitter never should have got in the game of tinkering with who sees what. The one thing I always liked about Twitter is that you create your own timeline, you add people you are interested in following, and it's as if the rest of Twitter barely exists.
Well they have to.
Someone starting out would have a blank profile. No timeline, no posts, nothing.
So they search for tags to find things then like it and subscribe.
But what happens if there's no updates? Your timeline gets very boring and you're likely to stop using it.
So to keep things fresh, new content that you didn't know you wanted pops up. Basically targeted advertising but with other posts.
This gives posters more exposure and gives consumers more content to consume that they might like.
And as such, twitter gets to keep selling your data to advertisers to keeo the servers running.