Why should you avoid eucalyptus and mysql too - Open scamware

But Eucalyptus has its own burden to carry. Eucalyptus might be open-source, but it uses something called an open-core model. Translated: There's a free community edition of Eucalyptus for everybody, but more advanced features beyond the basic stuff only go to paying customers.
This is exactly the model Mickos employed at MySQL, and it upset people then too.

http://www.theregister.co.uk/2011/05/19/marten_mickos_a_year_on/page2.html