Fees that scale on a linear, quadratic, or exponential schedule (or any other above-unity schedule) is a regressive tax. It would disproportionately harm smaller creators. I would run out of money for my IP far before Disney. Unless this scaling was also based on the amount of revenue produced thus far, it wouldn't achieve equitable aims. Even that proposition is dubious since Disney can afford better lawyers to parse the revenue streams to their benefit.

Note that I'm not for the proposition of revenue-based scaling. That would just be a tax on success.