Reference on the reasons why researchers in the industry publish

Why researchers in the industry publish? (condition of some grants, advertising some product/firm, disinterested willingness to contribute to public knowledge, etc.)

I am mostly interested in the field of computer science > machine learning / NLP / data mining, in English-speaking venues and in the USA.

It would be ideal if there is any research/study/survey that looked at those reasons, but I am also interested in answers supported by experience. I am especially interested in trying to rank those reasons (e.g. 30% of papers were published due to grant conditions, 50% for lab/researcher's credibility, 40% for the firm's visibility, etc.) or at least have a sense of what the main motivations are, and what other potential motivations play only a minor role in the publication intent.