Interesting article on the Open-Core business model... At XWiki we have chosen to go for a full LGPL model that we believe delivers more value to our community, be them users, developers or customers. It wasn't an easy discussion and we discussed it internally a number of times, but we always eventually came to the conclusion that keeping XWiki software under the LGPL license was the best thing to do.
To me, the key success factor isn't so much the choice of business model (be it Open-Core, dual licensing or subscription-based) that matters than the adoption of your software. If people download it, like it and keep using it, you'll figure a way to make money out of it. At least that's how we do it :-)
Open Core Is Bad For You - Community - ComputerworldUK
http://www.computerworlduk.com/community/blogs/index.cfm?entryid=3047
(via Instapaper)