Would you like to seed a viral video? Get ready to pay. Bloggers will not talk about your video just because you're a nice guy or your video is actually funny... Read on Business Week how the business of viral videos is expanding quickly. Advertisers are now asked to pay to have influentials talking about their videos. And not only. Advertising on websites with popular user-generated content is becoming more and more expensive.

Interesting to read is the opinion of Stefan Tornquist, research director at MarketingSherpa: "In some respects viral marketing is a victim of its own success. There is so much evocative content being produced by amateurs for free, and then there is competition among brands devoting more resources to viral marketing campaigns."