I would personally say that while marketing elements exist within the essays, they are more like an attempt to influence the industry he operates in (tech focus

I would personally say that while marketing elements exist within the essays, they are more like an attempt to influence the industry he operates in (tech focused venture capital) to as much an extent as he is capable with words alone. His essays strike me as appeals promoting a certain manner of thinking that he wishes to impart, while also naturally acting as marketing simply due to his own default mode of thought being deeply entrenched in entrepreneurship.