I simply upload it on their account directly.
I think I made a reputation here, if you want to trust the service go ahead, if not, it’s your choice. There will ALWAYS be someone like you.
Also, I NEVER sell ANY information to anyone.

P.S. OneSignal does EXACTLY that. So, if you’re going to use push notifications, you already agree analytics being used and sold. NOT by me, but by another company that offers their services for free. So why are you so aggressive ?