This has the look of data coming from an environmental organization (with a totally worthy agenda i'm sure). They exaggerate the surfing economy to make the point that we (or CR) don't pay enough attention to protecting the resource (which i'm also sure is true). In this case surfing resources of clean water, surf break preservation, coastal development etc.
The problem is if i cant believe their economic data, am i sure i can trust their environmental data? I sometimes have the same suspicion about the surfrider foundation, and Sierra Club, both of which i support.