I would assume Bosch knows how blatant paywalling features looks and will backfire just like it did for BMW.

I am guessing Bosch wants to create a Bosch ecosystem where you can control all your home appliances with a single app. This is what PC OEMs did with RGB software. It’s not really for surveillance although they do use it to push ads/premium features. The main intent is to lock you into their ecosystem and then you only buy products from them. Samsung & Apple do this are well known for this, and that’s what they’re emulating.