More like 1, even for the biggest brands. This is going to be way expensive. I think you are onto a good idea, except I get the impression NASA will prioritize missions that contribute to commercial or science R&D and/or production.
To qualify, commercial and marketing activities must either: require the unique microgravity environment to enable manufacturing, production or development of a commercial application; have a connection to NASA’s mission; or support the development of a sustainable low-Earth orbit economy.