This is true in every niche as far as I know. I am convinced that the vast majority of blogs that show up in search results are paid content mills and otherwise engaged in SEO operations, like paid link rings.
Based on conversations with other founders who have worked in various industries, I have had this suspicion as well. Some founders have no problem participating in the system ("it was like this with magazines—you bought advertising and then the wrote an article about you"), but others share my view and are trying to grow via different paths. Would be very interested in others' thoughts on what's worked for them!
