It's only cheaper if you want to publish to Windows, though. The moment you want to publish outside of Windows you have to factor in the additional costs of each license you need, unless you're willing to pay $1500 every year to publish on everything. Currently, MV allows you to export your games to web browser, Windows, as well as phones and tablets. GM2 requires a license for each of these things: $99 for Windows, $149 for web, and $399 for phones\tablets. I understand that $647 is cheap for a studio with some sort of funding, but many RPG Maker users have no financial backing outside of their own pockets.