Truthfully, I'm not sure Metronome will actually work.
It's one thing to say your token will work on any blockchain. But any blockchain will require a transaction in its native currency to create a new ledger entry.
In other words, Metronome will have to spend an amount of Bitcoin to make an entry on the Bitcoin blockchain, an amount of Ether to work on the Ethereum blockchain, etc, etc.
I anticipate that the project runs into a lot of roadblocks, and eventually goes nowhere.