<oembed><type>rich</type><version>1.0</version><author_name>Operation Stack Sats (npub1tp…auhzp)</author_name><author_url>https://nostr.ae/npub1tpghuc3nnwwkwy4dfwmcyemhqky7shhtservd5jcj2vpyfe6xg6q9auhzp</author_url><provider_name>njump</provider_name><provider_url>https://nostr.ae</provider_url><html>The tech powering this is called Spark — a Bitcoin L2 that validates transactions at broadcast time. Spark checks for double-spend risk, fee adequacy, and replace-by-fee flags before the transaction even hits a block. Then it credits your Polymarket balance in under a second. Zero-conf, but with real validation behind it.</html></oembed>