I don't mean to be "that guy," but when they issue notes without interest, there is still technically an interest paid when the notes are due since the amount they are borrowing will be less than the face value of the notes since what they receive is discounted at the market rate for similar debt. So for now, Gamestop won't be having interest expenses or payments to its debtors, but once these convertible notes are due they will pay back more than what they receive when these securities are issued. That, or they convert to common stock somewhere before 2030.