That makes no sense. The only phone companies that make money from how often you use your phone and buy apps on it are Apple and Google. If there were a market for it other companies would make them.
As far as the mini phones - because physics - the battery life is atrocious. That was one of the main drivers for me to get a larger phone. Well that and because I can pull down the Control Center and use the widget to make everything on my phone larger and still be able to use it without wearing my glasses. With my glasses, I keep everything the smallest size
Sorry, in my national market. Apple has 51%, Samsung has around 28% and Google 5%. These 3 hold almost 85% of the UK market.
Samsung, from what I remember used to side-load tons of apps (some alongside identical stock Android apps), so it's in their best interest to maximise screen time through media apps, which generally work best on a bigger screen.
It's against all of these companies interests to sell you a phone which you quickly use and put away. They all have every incentive to keep you staring, because they're all getting extra money from every ad you see in a game, TV show, movie, web browsing, or wherever else they can slot it.
As far as the mini phones - because physics - the battery life is atrocious. That was one of the main drivers for me to get a larger phone. Well that and because I can pull down the Control Center and use the widget to make everything on my phone larger and still be able to use it without wearing my glasses. With my glasses, I keep everything the smallest size