I had the experience of being shortlisted for a prize with a theme: "Green Energy" that turned out to be funded by a company that not only is known for its dirty coal-burning power stations but was also at the time suing Greenpeace for 1 million euros. It only took me a minute on Google to discover this. I considered entering the competition and then doing something "green" with the money - but what could one do? Give it to Greenpeace for their legal fees, I suppose. However, reading the small print, I then discovered that the company reserved the rights to use anything from the artist's proposal for publicity, whether they won the prize or not.
I found it very difficult to write a reply to the person who had proposed me for the prize, because of course I was flattered and I respected their judgement, but I did and they of course understood my position.
I would have definitely benefitted if there WERE texts dealing with refusing or publicising "dirty money" in the arts. One could of course ask: what is "clean money" ? I wish in a way that a public refusal was possible. Only acceptance is ever made public.
The only thing I can offer is a classic text about money (or lack of it) in the arts in general: Hollis Frampton's famous (?) letter to MOMA.