So the Metronome Owner's Manual (as well as other documentation) actually covers supply. There will be 10 million on day zero. 8 Million are available for purchase during the initial supply auction. Once the initial supply auction ends, the daily supply lots begin, these mint at the rate which is greater i) 2880 Metronome daily or ii) 2% of the then-outstanding supply annually, ad infinitum.
There is no maximum or minimum purchase outside of gas requirements for a successful transaction.
Metronome authors do not take proceeds from any of the auctions. Those stay in the ecosystem to provide long-term support for the community (you can read about that more here: https://medium.com/@MetronomeToken/on-metronome-author-retention-and-contract-behavior-73dad8f16494 and here: https://medium.com/@MetronomeToken/proceeds-for-the-community-not-the-authors-d41874d4d41f)
Thanks!