Earlier this month, a surprise chat between tech billionaire Elon Musk and Robinhood CEO Vlad Tenev on new audio-based social network Clubhouse has helped propel the app to the top of the startup charts and sparked a scramble for invitations to the exclusive service.
The interaction between the two entrepreneurs on the platform came amid intense interest in news around Robinhood, the online brokerage caught up in a wild stock market battle between retail investors and big Wall Street funds.
Demand for invitations to the less-than-a-year-old service - members get to invite a limited number of friends during its pre-launch period - is so hot, a market for them has grown on platforms like Reddit, eBay, and Craigslist.
In China, invitations are being sold on Alibaba's second-hand market place Idle Fish, even though Clubhouse isn't available in Apple's app store in that country.
In Japan, investors, tech workers, and the media have swarmed the service.