You need to do your homework
Google does not charge for Google Marketplace and the Google Apps for Android. Google just does NOT allow devices that compete directly with the iPod Touch and iPad to have Google Marketplace and Google Apps for Android. Archos is the ONLY COMPANY IN THE WORLD making Android based Tablets and Touch devices competing with iPod Touch. For no apparent reason does Google block manufacturers from making those types of devices. Apple has sold about 50 million iPod Touch and iPad devices thus it makes ABSOLUTELY NO SENSE for Google not to allow Android based devices to compete with those. Possible top-secret Google reasoning could be following:
1. Google has secret partnerships with multi-billion dollar companies HTC, Samsung, Motorola and does not want to allow for Android based disruption to come in from under them and offer $100-200 Android devices that consumers will choose instead of ones from HTC, Samsung and Motorola.
2. Google thinks it absolutely needs all hardware features such as compass, GPS/AGPS, back cameras and 3G for augmented reality and location based advertising. Even though Google has not proven yet that it can monetize location based advertising, they just put Marissa Mayer in charge of that project. I think it makes little sense as Google has proven they can monetize advertisement on the web no matter in which direction people are looking at.
3. Somehow Google argues that they cannot guarantee user experience accross different screen sizes, resolutions and hardware features. For one, they do support wide range of size and resolutions already as official Android 2.2 spec (since Android 1.6 actually), and for second, it's not like it would be really hard for them to filter out (hide) the 1% of apps from Marketplace of certain devices like Archos which may not come with all of the augmented reality hardware.
4. Fact is thus, no company in the world making less than 5 billion dollars in yearly revenues is allowed to licence access to Google Marketplace and the Google Apps.
@Neil Mitchell, you are very badly informed. Archos 5 Internet Tablet released October 2009 has Google Marketplace since November 2009 and updated to Android 1.6 since February 2010 and has had dozens of firmware updates, MANY MORE firmware updates always adding new features than Apple, Motorola, HTC, Samsung and Dell combined.