Delivering a consistent Twitter experience
dev.twitter.com
dev.twitter.com
It's the start of them inserting points of control in their system to allow them to deliver inline advertising that clients apps can't strip out.
I don't know if it's feasible, but I wish that services like Twitter would let me pay a subscription to not see ads, promoted tweets, and other services that "enhance" my "brand experience".
You need to be able to see expanded Tweets and other features that make Twitter more engaging and easier to use. These are the features that bring people closer to the things they care about. These are the features that make Twitter Twitter. We're looking forward to working with you to make Twitter even better.
We really don't need to be able to see these features - it's you who needs us to see them. These are not features that bring us closer to things we care about, these are features that enable you to sell us to brands.