Well many of those titles are just ports of old titles or titles that probably didn't cost much at all to make.
Phantom Brave and Disgaea 2 are ports of old PS2 titles and Classic Dungeon was probably real cheap to make.
That is probably how they kept alive. 
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)

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