Unfortunately, as I have previously written on my blog, Silversea is IMHO making the mistake of offering some innovative and/or alternative options, but is using them to find ways around the all inclusive nature of its product...and then really charging you big time.
I do not believe charging a fee for a restaurant is good logic - on a luxury line - to limit demand. The finest restaurants in the world do it by way of a thing called "reservations".
I do not believe charging for sake that is not at the level of JW Green or Blue is appropriate.
I do not believe charging for movies - blue or otherwise - is appropriate.
What is happening is that the exclusivity of Silversea is being undercut...which results in the premium people are willing to be paid to be undercut...which makes the demand reduce (or is that the prices, or the service or the cuisine...)