The business deals are T-class. According to the KLM website, they earn 25% FB miles and can be changed against a fee.
This is what the site says
see
http://www.klm.com/travel/aw_en/plan...ions/index.htm
Economy Flexible
No minimum stay is necessary for European travel. For intercontinental travel, a minimum stay is required. Changing a ticket is possible but will require paying an additional fee, and cancelling a ticket is possible against a fee. An exception applies to T- and L-classes for European travel: cancelling a ticket is not possible. You will be seated in Economy Class.