dhcpcanon

If I understand it correctly, the "Open Knowledge Foundation Deutschland" has received roughly $3 mio in government funding annually to promote "Cyber sovereignty". You are correct that the individual grant to microG was probably capped at €47k, but since they also sent out grant money to https://www.qubes-os.org/ https://openwrt.org/ https://bitmask.net/ https://github.com/juga0/dhcpcanon https://taler.net/en/index.html https://identity-stick.github.io/ https://github.com/lernapparat/lotranslate https://sbws.readthedocs.io/en/latest/ https://leap.se/ https://robur.io/Our%20Work/Projects#OpenVPN it looks like a coordinated campaign to me. The list includes a privacy-conscious OS, some VPNs, some Tor services, and a Cloud-free translation system for LibreOffice. microG very much fits into that list of tools to avoid Google's spying eye.

Note that your MAC address is only one part of the identifying information your computer gives to the DHCP server. For another approach check out DHCPcAnon: https://github.com/juga0/dhcpcanon You can contribute to the development of this project by helping to integrate it with your favorite WiFi manager.