Neat and fun PR stunt. Tech needs more of these! SGI did this almost three decades ago: https://web.archive.org/web/19971210213248/http://lavarand.sgi.com/ ht

Neat and fun PR stunt. Tech needs more of these! SGI did this almost three decades ago: https://web.archive.org/web/19971210213248/http://lavarand.sgi.com/ https://web.archive.org/web/19971210213248/http://lavarand.s... ...harnessing the power of Lava Lite® lamps to generate truly random numbers since 1996. According to https://www.lavarand.org/news/lavadiff.html https://www.lavarand.org/news/lavadiff.html: Seed production rate was about 8000 bits of seed per second on a 200 MHz SGI O2 under IRIX 6.5. The patent has since expired: https://patents.google.com/patent/US5732138A https://patents.google.com/patent/US5732138A (And Cloudflare re-implemented it, seemingly starting just after the patent expired in 2016.)