A quote from the article:
"in the cloud the source code is the Terms of Use and the SLA,"
This sounds like its straight from "1984". Seriously, there is code associated with the software running on cloud servers.
From the article:
"Open core, or open source, is the existing model in which core features are open source and value-added proprietary commercial software is built on top of it to monetize the technology.
This is one model used by successful open-source, software companies to monetize their technology. Another model that has proved successful is to provide services for their open-source technologies. One can also combine the two models.
Google is an interesting open core cloud service provider with Google Search, Gmail, Google Places, Google Docs, Google Apps and, most recently, Google+ running on their customized distributed Linux servers. And dont forget Google File System, MapReduce, BigTable, etc. Yes, 'open core' fits Google quite nicely too.
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