That was hardly surprising as you can watch live BBC channels from iplayer.
There will eventually be a tipping point where the number of subscribers dips below the minimum amount needed to fund the BBC. Which means the only way they'd continue is:
a) requesting extra funding from the government - would seem unlikely to happen long term
b) increase the cost of a license - again unlikely, the government might allow minor increases, but at that point the general public are going to be more put off paying for it.
c) have to swap to a commercial model by way of adverts or start charging a subscription for iplayer etc
They could sell off iplayer, would massively reduce operating costs. Then work out a deal to supply BBC content to iplayer yearly at a cost.