Woofun AI reports that Polymarket has integrated Spark, a Bitcoin Layer 2 payment protocol, to facilitate instant deposits through the Bitcoin Lightning Network. Spark serves as the underlying infrastructure, allowing users to deposit directly with BTC, with funds arriving in seconds. This mechanism contrasts with traditional on-chain Bitcoin transfers, which require 30 minutes to 1 hour for confirmation, offering improved speed, reduced costs, and enhanced privacy. The integration aligns with Polymarket's ongoing initiative to improve the Bitcoin payment experience, building upon its prior support for Bitcoin deposits.