Honest conversations with trail running industry pros, and fans who love the mountains. One of the longest running podcast in the scene. This is Singletrack.  

Matt Walsh takes a stab at writing a explainer for his newsletter Trailmix:

The business model of the series has been the same from the start. GTS do not own any races and race organisers do not have to pay GTS to be a part of the series. Instead, GTS supplies a sponsorship fee and has a series of event requirements such as live-streaming, press conferences and athlete presentations (varying on World or National series level) which organisers might spend their sponsorship fee on. 

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