Subscription service I doubt on the grounds that nobody is likely to subscribe. Even less than those who are reluctantly paying their licence fee. I worked for the BBC for 34 years and there is not much I have not seen. This thread is not about how disgusted I am with their behaviour, but this latest ploy will show their devious thinking and is relevant to the OP.
Newspaper reports indicate the following:-

Sweeping changes could be on the horizon for the much-maligned BBC licence fee, with fresh proposals hinting at a merger of the £174 licence fee with regular household bills to ensure collective payment across UK homes.

Council tax in fact! This is the German system I'm told. So there you are. We still won't be given any choice. How many people will have the nerve or the energy to cross the fee off the bill. Will we get our Folk music progs back? What do you think? Just a sustained campaign of 'look how wonderful we are' adverts followed by the usual bias and arrogance.