(Bloomberg) For years, Amazon.com Inc. has been the stingiest among tech megacaps to give back capital to shareholders. Now, it’s generating so much cash that some on Wall Street are anticipating more generous returns.Most Read from BloombergApple Explores Home Robotics as Potential ‘Next Big Thing’ After Car FizzlesKim Jong Un Faces Annihilation in Most Korea War ScenariosTexas Toll Road Takeover to Cost Taxpayers at Least $1.7 BillionTSMC Facilities to Resume Production Overnight After Quak