I'll explain it!

Back in 1990, they had to build an entire custom chip for each game. Look at this fucker. So much work went into this. It's incredibly durable as well. You could rent out this cartridge. Hundreds of SNES could play this game from a Blockbuster...

The creator also had to make a manual too. Usually printed in color to feel like a premium product.

Finally, the creators had to multiply this creation process, create a colored box, shrink wrap it, send it to distributors, fly it across the world, truck it to each Frys, EB Games, Toys-R-Us, and have an employee display it.

They did this for $50. Now all you do is click buy and download it, for $70. They don't have to make SHIT anymore. No shipping, no employees working, NOTHING. Then you pay for it? Games should be dirt fucking cheap. Infinite replication at the cost of pennies in electricity... that you pay for already, and internet... that you pay for already.