What should the max percent of value in total holdings of Stabinol be for cashback?

Stabinol is a new token created by the Stabilize team that will help offset the cost of ETH expenditures.

Every 24 hours, users can claim cashback to cover the cost of their ETH expenditures during the previous 24 hours. This cashback is limited to a percentage of USD value in holdings of Stabinol or an absolute monetary limit defined by another proposal, whichever is lower.

What should the initial percentage be for cashback?

This proposal is advisory for the team, meaning it is consultative rather than affirmative.