WASHINGTON, DC - OCTOBER 23: Facebook co-founder and CEO Mark Zuckerberg (L) testifies before the House Financial Services Committee in the Rayburn House Office Building on Capitol Hill October 23, 2019 in Washington, DC. (Photo by Chip Somodevilla/Getty Images)Getty Images Stripe just pulled back the curtain on Tempo, its corporate blockchain, and the pitch is a classic. You get an all-star team, state-of-the-art tech, an impressive roster of partners—including one of the card networks the whol...