This page provides Greenstone users' suggestions on ways to monetize your Greenstone collection.
Amazon.com integration can be a nice revenue stream, generating 20% returns on every sale made through a link from your site. Koha is an ILS system that can import CDS/ISIS format exported from Greenstone.
Sometimes downloading huge files, especially if there are many of them, can be a hassle. Providing duplication services can help both the library and the end-user. CD / DVD duplication using the Greenstone export to CD function can be a great way to publicize your library as well as make some money on the side. Creating a versatile structure to support this feature is lacking from the end-user end, however it can be done with a versed librarian behind the wheel of the collections
Sometimes media, such as posters, maps, videos, and even complete books can be integrated with websites like Allposters.com and Zazzle.com to create a high-end product. Libraries can sell directly from their site, or purchase duplicates for sale in the gift shop.
Google books provides an interesting opportunity along these lines