It's a niche viewpoint. I do want to live in an adsense world, as do most users. They find adverts useful. >> "DHH has talked before about his opposition to ad

It's a niche viewpoint. I do want to live in an adsense world, as do most users. They find adverts useful. >> "DHH has talked before about his opposition to ad-based businesses. It is bread crumbs on a per user basis. That means you need a huge number of eyeballs to profit. Building a system so large and popular that it gets that many users is difficult and there is a lottery factor." I think basically, it's 'harder'. It's a harder problem to solve. But really, you can setup a profitable website in the right niche earning good money from advertising easily without requiring large number of eyeballs.