These products can only be made if people don't opt out, otherwise there'd be no profit. And who would opt in? The only reason you can opt out is that most people won't.
So what's the business model behind a launcher app then?
Sell analytics and app usage information
So once again, the user is not the customer but the product. When will these scams stop...
Obviously I think it should be opt-in. I'm not surprised it isn't, though