Never, because Square Enix hates it when you try to give them money.
Also notice that Square Enix's widely popular PSP RPG: Final Fantasy VII - Crisis Core will also never be put on the store.
Blame the company's idiocy. Just like they didn't release Final Mixes in America where, in some cases, game sales on a title-to-title basis sold up to 8x as many copies in America as they did in Japan.
Dont just blame square. companies are afraid of piracy. Disney also has to agree to it.
Also, little known fact that Sony blocked the Final Mixes from coming to america. SCEA made it so that very few games got collector's editions based on in-game content alone. If square was really as idiotic as people say they are, theyd've never survived the nineties let alone now.