User-generated content is expected to be the recipient of a major influx of ad dollars, according to a new estimate by eMarketer, reports AdWeek.

The prediction comes from eMarketer, which says that, by 2011, ad spend on user-generated content will reach $4.3 billion. That would be a 330 percent increase over the $1 billion spent on the medium this year.

That increase is likely to benefit established social networks like MySpace and Facebook, meaning advertiser thinking will continue to revolve around reach and buying via established parties, instead of reaching out to the content producer directly.

Video will likely also explode as more producers get access to easier-to-use tools and continue to build content. By 2011, eMarketer estimates 50 million video clips will be streamed per year, up from the 12.4 billion in 2006.

Spending on consumer-generated-video is expected to hit $4.1 billion, up from last year's $410 million.