Playfulness should demonstrate the proposition
A playful B2B campaign should express the offer through its creative choices. For Lawyers on Demand, The Frameworks used anagrams, wordplay and bold typography to demonstrate the legal-services brand's focus on seeing things differently. The campaign appealed to human curiosity while reflecting what the business offered: a different way of thinking.
The useful principle is to make the playful device part of the proposition. In the Lawyers on Demand campaign, playing with words demonstrated the brand's perspective rather than simply decorating a conventional sales message. The Frameworks argues that business communications still address people, whose professional responsibilities do not remove their capacity for curiosity or enjoyment. Playfulness belongs in a serious campaign when the audience's enjoyment helps communicate the business idea.
Sources: Why bold design is good business