Both are common. The right one depends on your growth and your need for stability.
You earn a percentage of everything. Uncapped upside if the account grows, but income swings with performance.
A set, predictable amount regardless of a slow month. Safer, but you don’t capture the upside if the account explodes.
Some deals combine a small base with a split. Start with us and choose a percentage or a fixed amount, with extra terms agreed up front.