Provide a competitive analysis between IonQ, Rigetti, Amazon focused on their quantum computing services. Specifically, for each company, describe their value proposition, a review of their quantum computing business (stage, partnerships, key achievements), any patents they hold related to quantum computing, the key audience for their quantum computing activities, key marketing messages related the quantum computing and their marketing tactics to reach this audience (e.g., social channels, blogs, webinars, hackathons, marketing videos).