Why Shouldn't Video Sites Focus on Where the $$$ Is?

I found this NY Times storyyesterday to be a surprising and interesting read.

Brad Stone and Miguel Helft write:

Web companies that rely on advertising are enjoying some of their most vibrant growth in developing countries. But those are also the same places where it can be the most expensive to operate, since Web companies often need more servers to make content available to parts of the world with limited bandwidth. And in those countries, online display advertising is least likely to translate into results.

This intractable contradiction has become a serious drag on the bottom lines of photo-sharing sites, social networks and video distributors like YouTube. It is also threatening the fervent idealism of Internet entrepreneurs, who hoped to unite the world in a single online village but are increasingly finding that the economics of that vision just do not work.

Last year, Veoh, a video-sharing site operated from San Diego, decided to block its service from users in Africa, Asia, Latin America and Eastern Europe, citing the dim prospects of making money and the high cost of delivering video there.

Why not?