eMarketer.com’s report estimates that the big 4 will account for 66.6% on online advertising revenue in 2007.
| 2004 | 2007 | |
| 13.1% | 32.1% | |
| Yahoo! | 18.4% | 18.7% |
| AOL | 6.8% | 9.1% |
| MSN | 9.4% | 6.8% |
| Total: | 47.7% | 66.6% |
Even without Google , the remaining 3 still account for 1/3 of the internet ad spend total.
