I haven't seen that much bias. If anything, the opposite - PG said his own startup spent a lot of money on PR ( <a href="http://www.paulgraham.com/submarine.html" rel="nofollow">http://www.paulgraham.com/submarine.html</a> ) , and Steve Blank and Osterwalder make a big point of marketing ( <a href="https://steveblank.com/category/marketing/" rel="nofollow">https://steveblank.com/category/marketing/</a> )