Put another way, it is necessary for Spreadshirt to increase the (print + product type) price by the 20% commission if the 20% commission will be coming out of this price in the future. The new model requires this.

However, that's not all Spreadshirt is doing. Spreadshirt is also increasing its share of the price by 10% to 20%, according to the calculator. This is not required by the new model. This is a hidden price hike.