My memory is a bit faulty on this, but I think it was Fortune Summoners Deluxe that sunk the possibility of a sequel, due to the professional voice acting that was contracted. The original Fortune Summoners sold enough to be picked up by a small publisher called Jungle Japan, which required the game to be "sweetened" before being distributed. That version of Fortune Summoners was the Deluxe edition, which bombed.
I think part of the reason is because while I do think that Fortune Summoners has potential to be a pretty good series, there are many flaws in the first game. For example, no quick-travel system between towns is one of the bigger issues, as it introduces a fair bit of tedium. That said, I think that a new Fortune Summoners game would be more successful, because digital distribution has become much more widespread and effective since 2008, and we now have companies like Carpe Fulgur to assist in the translation and PR. Basically, conditions are better now than they were before.
In any case, if we hypothetically did a Fortune Summoners kickstarter with Carpe Fulgur's cooperation, the tiers would be the utmost importance. People need to feel like that they are getting something out of an kickstarter, as one of the attractions of a kickstarter is the pre-orders and goodies. Carpe Fulgur could offer its older games as part of the tiers, as sales would have tapered off among the bigger distribution channels. As such, a kickstarter would make people unfamiliar with Carpe Fulgur but interested in Kickstarting to become aware of Carpe Fulgur. This may possibly lead to more sales when future Carpe Fulgur games are released.
$5 - Receive a copy of Recettear*
$10 - Receive Fortune Summoners & Recettear
$15 - The above, plus Fortune Summoners II
$20 - The above, plus Chantelise
$40 - The above, plus Carpe Fulgur's mystery project.
*The flaws of Fortune Summoners I might turn people off from donating to higher tiers later, so having an excellent game like Recettear in the first tier would leave a good impression on folk. Is this sound reasoning? I feel kinda slimy for it, though.
Funding Goal & Stretch Goals: The Shadowrun Returns kickstarter has two kinds of goals, an "basic" goal of $400,000 dollars, and offers to further expand the game if higher amounts of funds are achieved, such as improved music and an editor if $1,000,000 bucks are donated. (Currently funded at $800,000) By having funding goals that are tiered, a kickstarter could make clear what sorts of things can happen if there is enough money. This might convince crowds to continue funding up to that point at least. For example:
$20,000 - Fortune Summoners II
$30,000 - Remake of Fortune Summoners that is integrated into Fortune Summoners II
$50,000 - Carpe Fulgur translates an additional game.