For a few reasons:

- see how my POD formatting looks after CPAN renders it
- get an idea of how my tests are performing
- allow testers to fetch from CPAN as opposed to download/install
- test dependency issues
- test any custom installation tasks in an automated install
[download]

I don't plan on uploading anything until I'm comfortable with everything I said in the POD is true (ie. I have a couple of features to finish off), and beyond that, some of the examples I currently use in SYNOPSIS will change significantly due to new efficiencies/ease-of-use features I'm finishing up.