If you've got a highly questionable investment to sell and are therefore in search of people with a remarkably high ratio of disposable income to intelligence, you really can't go past sportsmen.
And, in a procedure practically diagnostic of pseudoscience all by itself, Firepower have promised lots of really convincing test results that prove their claims but, so far, failed to deliver.
(In case you're wondering, "spruik" is a more-Australian-than-English word meaning "advertise", particularly in the context of making a sales speech to people passing by. Some Australian shops employ "spruikers", traditionally English (sounding...) people, to stand outside with a microphone and a little amplifier and encourage people to come inside. This is a parody, but it's a quite accurate depiction of the species. And it's also aimed at AWB Limited, the previously mentioned scandalously corrupt Australian quasi-governmental organisation that's loosely connected with Firepower.)
Oh, wait - did I forget to mention that Firepower's European chief executive was previously the head of Halliburton in Germany?
(First Firepower post here.)