The fees could add up and take the amount over $1.
This does not account for the fact that there is no proof of the transaction, it should show up in the transaction history.
[1] https://help.coinbase.com/en/commerce/getting-started/withdrawals
- Jay -
You are quoting the Coinbase Commerce section of their Help site, which only applies to merchants. They have a non-custodial version of Coinbase Commerce so the minimum withdrawal on this service would be whatever is the minimum amount you can send on the Bitcoin network which is usually a few cents. As far as their exchange goes I no longer have an account there but the minimum withdrawal is certainly more than $1. I believe it used to be 0.005 BTC a few years ago.