The trade-off is simple to me (both as a reader and more recently as a provider): it is time vs money. How long would you need to collect, organize and present

The trade-off is simple to me (both as a reader and more recently as a provider): it is time vs money. How long would you need to collect, organize and present the material you are buying? Any well conceived eBook or mini course you need is so cheap compared to its cost, in that sense.