[HenkPoley]

The Shazam developer collected device IDs, so that beta testers can now install the free version and still get to the things you could do in the beta (unlimited tagging).

So, with a bit of preparation they could have handled Tweetie customers differently in the Twitter app.

[jonknee]

Assuming that people still have the same devices as they did two years ago when they bought Tweetie.