As I said you can't look at what happened in the past and expect the same thing, because the world had changed since then. The narrative back then was "you need to sell hardware at loss", because the idea was to make volume in order to make lots of revenue. But shareholders were starting to put pressure to have profits and not just revenue. That's why IBM, HP or Dell moved away from some hardware businesses to focus on margin rich hardwares ( storage or servers ) or services.
But there is one actor that change all that : Apple. Apple showed that narrative wasn't right, you can sell hardware by actually making profits. Lots of profits. And you can see that this Apple trend moved into the videogames industry. When Sony launched the PS3 the cost of the machine was 800$ ! But as you know it was sold 600$. Could you imagine the loss ? The PS4 was making profits, that's how Sony turned things around. This is what Kaz said :
"From a profitability perspective, PS4 is also already contributing profit on a hardware unit basis, establishing a very different business framework from that of previous platform businesses"
So the message is clear : the days of selling platforms ar loss the old way is gone.
So yes PS+ brings more money, but the plan is not to use that money to sell a console at loss ! The idea is to use the money to re-invest it in new services and a better infrastructure.
The only reason you would sell at loss a hardware today, is if you want to enter a new market. Google and Amazon did that with their tablets for example. But there is no need for Nintendo, Microsoft or Nintendo to do so.
Source :
https://www.google.es/amp/s/www.pol...4344/ps4-already-profitable-for-sony-ceo-says