They don't care about email scraping (which would be illegal)
They simply want people to install the app because it exfiltrates a lot of tasty data to them.
An email might "only" contain ab invisible image to track views and unique links for tracking clicks, while if the user opens the app they way more data.
From the APK I see they can get stuff like
- All the contacts of the user, all email addresses and phone numbers
- GPS location
- Camera and photos
- Microphone
- Your phone number, your device IMEI and your unique advertising id, for cross tracking you better around other sites
- Send push notifications for FOMO promotions like "OMG it's the last one buy now before it gets sold out!!!"

Why, what news? What I need to be careful this time?