Re: Motivations
For the last decade or so, the streaming services have been funded by VC cash. We're coming to the end of that now, so you will have to pay a subscription and *still* have to watch ads. In future that sub will be bigger. So between that, and all the services the BBC currently provides, I'd say it does pretty well.
I don't see the TV licence being around for long though, it isn't sustainable. I see a hybrid ad/subscription model working for the broadcasting side of things: broadcast tv and radio will have ads, which internet based video and audio will have a paid ad-free option.
I imagine the BBC websites will be funded though. possibly in the same way: a paid ad-free version.
I suspect the funding from these sources will be insufficient to maintain the quality of the current services.
Who knows. Maybe Radio 4 & Newsnight current affairs will go it alone, or merge with GB news.