It also saves money as I don't need to buy the game to experience it.

Ahh now I somewhat understand the fascination with Let's Plays XD

_{and also some of the self-righteous indignation viewers feel when the player they're watching chooses a path that's different to the one they wanted/would have chosen in which case they can bloody well stop watching or get the game themselves and do whatever they want, the arrogant little prats XD}