Twitter may not have informed you of their new strategy (I wish I could remember if I was contacted – not that I remember), but they intend to collect a list of apps you use. Their rationale and what you can do if you object is provided by Twitter.
I do not like the “opt out” strategy as a reasonable way to disapprove of the business strategy of an online company. I understand that these companies must generate revenue, but I wonder about the awareness of the general public and whether most understand just how they are providing compensation.