Unfortunately, they will deem the resort to be open even if there's only one run available - think there's been some previous posts on a similar topic, maybe talking about claiming for piste closure on insurance, but all boils down to the same thing.
You're right PP, it's not a ransom but it's still 286 lev which is roughly 140 quid. Then skis on top of that. Maybe that's my fault for not going with a tour company.
Personally I would have thought that if the runs are restricted, the queues for the lifts wwould be twice as long and you'll use the lifts half as much!!
As for what you are charged for this partial service, I agree you, its just one of those things. C'est la vie!!