The more the American right puts more investment in Ganji by its unprecedented support, the more the Islamic Regime would become determined in taking care of Ganji.
Only a dead Ganji would give Mr. Bush a unifying symbol (a martyr) for the future phases of their desperate efforts to change the regime of Iran from outside. That's why they are all loving him so much. Because a dead Ganji will not be able to have nuanced opinions and could easily be hijacked by the neoconservatives for their own agenda.
The authoritarian regime of Iran is smart enough to keep Ganji alive and to use him for their own future plans; the same way they did when they found him a keen supporter of boycotting the last presidential elections. (They released him for a few days and allowed him to do as many interviews in defence of the boycott strategy, which was partly the reason for Ahmadinejad's win.) Ganji, in my mind, has started a game in which the only winner will again be Khamanei and the biggest loser would be himself -- and of course Mr. Bush. They would keep him alive and will find a way to discredit him or make him ineffective by sending him to exile for, perhaps, 'medical purposes.' They are good at this. They've done it for almost three decades.