A: Hi there—this can indeed be a bit confusing. The "Stack 99 add" phrase is our way of saying you can add extra codes to increase your storage and capacity, but currently the system only supports stacking up to 10 additional codes per account. In other words, you pay $59 for each extra code, up to a maximum of 10 extra codes (plus your initial code). So, you're looking at $59 x 10 for the maximum add-ons—not $59 x 99. Hope that clears things up!