Probably because Apple didn't delete the app. So they have nothing to explain. Now I realize that Matt Drudge is such a shy, reticent kind of guy who wouldn't think of stirring up trouble, so if Apple had removed his app from the app store it would never occur to him to complain about it to his audience. Oh, wait...
The fact is that Drudge hasn't said a word about it in the 8 months since it has been gone. I can only think of two logical possibilities:
- Drudge removed it.
- Apple caught the app stealing user data.
Even when asked directly, Drudge has ignored the question. So I would lean towards the 2nd possibility. However, for the first possibility, last June drudgereport.com was completely redesigned to make it "responsive" - that is, have it dynamically adapt to the type of device it is displayed on. It's really rather attractive now, whether viewed on a computer, a smartphone or a tablet. And each view is different and optimized for the device it is viewed on. So it's likely that PTB at Drudge decided they didn't need a separate app that they would have to continue paying for and supporting.
What you can do to access the Drudge Report is to go to https://drudgereport.com in the Safari (or other) browser on your phone. And if you use Safari you can even save the link as a "favorite" with its own icon on your Home screen, just as if it was an app.