Hmm, I disagree with charging extra for something that's essentially expected core functionality. Like banks charging customers extra for every little thing that should really come free as part of the package.
I'm sure there are tangential services that masternodes can provide that can be monetized, but an 'anonymous' currency should be anonymous for everyone IMHO.
Creating a some-of-us-are-more-equal-than-others setup will also be absolutely horrible PR.
My feeling as well. There may be something there but charging extra for better services can't happen. Totally acceptable thing for a business, not so much for a crypto like DRK.