Deploying Brand Tokens
Yes, you can mint tokens as you go, so you can start with the minimum required amount and mint more as needed for distribution.
Yes, the smart contract to create Brand Tokens requires the full value of all minted tokens to be backed by the stake. There is no way around this requirement.
For now you can unstake by contacting the OST Team at firstname.lastname@example.org and receive a response within 24 hours. OST is currently working to build functionality into OST Platform to allow you to securely unstake on your own.