Optimism announced that the fifth round of retroactive public goods fundraising (Retro Funding 5: OP Stack) will open for applications on August 15 and close on August 29. 8 million OP will be used to reward OP Stack contributors between October 2023 and August 2024. The review process for this round of applications will take place from August 30 to September 13, voting will take place from September 14 to September 28, and the results will be announced and the grant delivery date will be October 3.