Full Control permisson is safe ?

If I allow it, 
1. Are all my activations (camera, sns, etc.) collected by bitdefender? My Data will be sent anywhere?
2. And if collected, will that data be used for improvement purposes or anything? 
3. Also, why do you need permission to read the entire app screen? I don't doubt the company, but I still want to know for sure.

Thanks to read my question.