Hi, I am just thinking that some industries have really large fixed costs, this may be applicable in the tech industry, and if so revenue max could generate greater profits as economic profit=revenue-costs.
Also if firm has perishable goods, such as a florist. These flowers would need to be sold before they wilt, and if not sold, they would have to be thrown away. In this case it is rational for the firm to aim to revenue max, to dispose of this stock to at least cover the costs of it.
Hope this help, I don't know what the mark scheme would say, but this is how I would start to approach it.