After almost three years as a BitMEX open source development grantee, Calvin Kim is leaving the program. Calvin has received a US$100,000 grant from the Human Rights Foundation (HRF), which was announced on 9 May 2023. The presence of other funders, like the HRF, to step up and support Calvin, illustrates the much richer and more vibrant developer funding environment for Bitcoin which exists today, compared to the 2019/20 period when BitMEX launched the open source developer funding program. The steady support that BitMEX provided allowed me to grow as a Bitcoin developer and helped me contribute meaningful research to the Bitcoin ecosystem. While on the BitMEX program, Calvin produced some excellent blog posts explaining how Utreexo works, with some informative diagrams.