Update: Brad F has a response here where he takes issue with my logic and adds some new points on the topic.
Dinklage sez: I sort of learned not to accept those roles, where I'm playing a sight gag ...
We, as organisms, have the ability to reflect on our world and lives and express ourselves. It's a natural state, it just happens. Art represents the many ways we communicate these ideas to others. Once we were living in large enough communities, several issues came up. One biggie is art in the service of power. Like propaganda. Some fellow coined the phrase the pen is mightier than the sword. Another issue is art used to sell things, or the intersection of art and commerce. This is especially relevant today as we live in a global consumer age and the people who run it have the power. What effect does all this have on music and the cultural communities around it? This is nothing new or controversial. Talking about these issues shouldn't bring up shock, panic or defensive behavior. But, I find that when I bring this idea up, especially in relation to the actions of PR and advertising companies in arts communities, it causes a lot of fuss - predictably, from people within the advertising/PR community themselves.
One rebuttal I often hear is that selling out is a dated concept and there's nothing wrong with making money from your work.