For businesses, this is a good question. H.264 licensing can be relatively inexpensive (free for moderate use, cheaper than MP3 or AAC for high-volume use). So

For businesses, this is a good question. H.264 licensing can be relatively inexpensive (free for moderate use, cheaper than MP3 or AAC for high-volume use). So most businesses are probably better off using H.264 than Theora. Firefox is another story; they aren't charging, and according to the article, would be responsible for the licensing costs for every one of their (hundreds of millions of?) users.