It was very clever marketing on the part of Atari to implement its own comics series, as back in those days we didn't have things like the internet, and of course marketing on cable television came at quite a hefty price during that time as well.
It seems a lot of brands rallied behind the idea of having a unique mascot to represent themselves to the public. Kind of like how Sega plastered Sonic on just about every product imaginable related to its brand for decade; even selling custom Sonic themed hoodies on its own web store today.
As for the legal battles between Magnavox and Atari, its amazing how much inflation we've seen since the 1970's, considering how $1.5 million back then would easily be an equivalent in the billions today.
The one game on this list that really caught me by surprise was Crystal Castles. It felt a lot like a mix between Qbert and Pacman, a very innovative design indeed.