Why NIS kept Disgaea4 PS3 exclusive?

[badgenome]

Doobie_wop said:

They'd have to use a whole new unfimiliar engine, pay licensing costs and then make ports. It's much cheaper, easier and profitable to just use a great free engine and make a PS3/PSP/PSN exclusive, especially when you consider that the 360 version would probably only sell around the 10,000 mark in Japan and then around 40,000 every where else.

Porting is only cheap when you use a cross compatible engine, have the time and resources to pull away teams from other projects and your guranteed an extra 100,000 units in sales. 

PhyreEngine is supposed to be great for multiplatform games, although I don't know of many that have made it over to the 360 (only Gripshift comes to mind).