There has got be a better way to think about this market that just selling eBooks. It's premium information conveyance, right? Like a stock tip sheet? My broth

There has got be a better way to think about this market that just selling eBooks. It's premium information conveyance, right? Like a stock tip sheet? My brother is in a marketplace that depends heavily on advertising to get customers. He spends several hundred a year, just on newsletters and eBooks that tell him how to best utilize his advertising budget, which seems to be over a thousand per month.