Because it's free, open-source, can be modified and used as desired without licensing issues in most scenarios.
Licensing companies help other businesses get the proper licenses needed to keep their products. This can include trademarks and copyright issues.
There are some issues with this. Browse the sap web site about this.
There's nothing really unique about Linux's licensing, it's just the GPL version 2. However it is regarded as unique among operating systems where operating systems tend to be walled off, highly proprietary bundles of software that, in some cases, users aren't even allowed to modify or replace. Linux, on the other hand, is all about letting you give it away, change what you want, even get rid of it if you want to.
Nothing. The GPL is not a license you purchase. It is legal to sell Linux distributions, but most (Except for Red Hat Enterprise and a few others.) don't cost a thing and are free to download.
In general Linux has no restrictions on the number of users in a server. Commercial Unix vendors vary in what they allow by licensing, so it depends on the vendor.
Linux seems to have corrected my issues
Because that's what the most of the people who develop and distribute it are willing to charge for it. The licensing of Linux actually doesn't stop anybody from selling it for whatever price they want.
Not all Linux partitions are ext3. It just happens to be the most popular file system. ext3 was created especially for Linux, so it is free from any patent issues involved with some other file systems.
For the moment they won't. There are licensing issues to be dealt with just as for Rock Band:Beatles
Disney Studios Licensing is the clearinghouse for all Disney copyright issues.
Open-source software refers to software that that has licensing terms that allows modification and distribution.