QuickTime Pro has long been Apple’s paid upgrade to the QuickTime media player software, unlocking some minor features in the software such as video encoding, iSight / mic recording, and the ability to save videos from the Internet. It currently costs $29.99 for either the Windows or Mac version.
The latest seeds of of Mac OS X 10.6 Snow Leopard are suggesting that Apple may in fact be eliminating the QuickTime Pro upgrade entirely. Current Snow Leopard builds reportedly have all QuickTime features fully enabled, and the “Buy QuickTime Pro” and “Registration” menu items have been removed from System Preferences and the QuickTime menu.
These changes may reflect Apple disregarding QuickTime Pro and allowing all of its features to be available for free. Apple said it would be revamping QuickTime in Snow Leopard with the introduction of “QuickTime X,” using technology from the iPhone to optimize it for playback of more modern media formats.
Product [QuickTime Pro] Via [MacRumors]
More likely, since it's a beta, they want all the features available for all testers, so they get more testing.