Publishing is a business. As a writer, you are enaging in business with others, sometimes including large corporations. […] They will seek to extract the maximum benefit from you that they can, and from others with whom they engage in business, consistent with their current set of business goals. This does not make them evil — it makes them business entities (they might also be evil, or might not be, but that’s a different thing). If you’re treating these businesses as friends, you’re likely to get screwed.
And for God’s sake, don’t confuse being friends with people at those businesses with being friends with the business.
–John Scalzi, publishing still business, film at 11.