This would be pretty rare. There's no doubt they get a lot in billable hours, and the pay-out process - if complex - can be expensive, but my understanding is it's typically closer to 20% to the lawyers and maybe 5-8% more in administration. It's definitely a lot but not averaging 50%.

Right! THAT is the “business” with a political position in this case. Not the one seeking a refund on illegal taxes. It doesn’t have to be in my personal best interest for me to think it makes sense for a retailer to seek a tariff refund!