The generation-specific costs (cartridges) and margins (physical retailer cuts, boxes, licensing fees) would have also been corrected for inflation.

A bit of research shows an approximate $7 for developer cut of each sale at the 1988 figures. Given the approximate inflation adjustment, that becomes $18.20. Given that cartridge, physical retailers, and boxes are mostly gone, and even even with the deep licensing fees of the platforms today (30%), a $50 game will make the developer almost twice as much revenue as it did in 1988.