The Vanishing Of The Podraces...
I just received a free demo of Star Wars Demoliion and with it came a "clue" to why the Podraces were no longer around during the time of ANH. Here's what it said- The Empire has outlawed the dangerous Podraces, but Jabba the Hutt has devised an even more dangerous underground contest to attract high-stakes gamblers from across the galaxy to his betting palors on Tatooine... A DEMOLITION. This may not be "canon", but it still is great information.