According to Odaily Planet Daily, Optimism posted on the X platform that more than 200 projects have submitted applications for the fourth round of Retro Funding, and the application deadline is 03:00 Beijing time on June 7. Earlier on May 23, Optimism announced on the X platform that the fourth round of retroactive public goods fundraising applications have been opened, and 10 million OPs are dedicated to on-chain builders who deploy contracts on Superchain and generate block space needs.