Here is the numbers from Prison Architect, they implemented a crowd-funding model and are still in Alpha and already have raised over $3.4 million
Base Pack ($30): (Included Alpha Access) 89,811 Sold - $2,694,330 (Greenlighted on Steam now)
Aficionado ($35): (Includes Alpha Access, PDF of Prison Architect Art book, and a download of the Official Sound Track.) , all previous tiers of donation rewards- 3,841 Sold ( $134,435 )
Introversioner ($40): Get all four Introversion games, all previous tiers of donation rewards 6,689 Sold - $267,560
Name in the Game ($50): One of the prisoners named after you, all previous tiers of donation rewards 5,945 Sold - $297,250
Physical Pleasures ($100): special limited edition Game DVD and Soundtrack CD, a Poster, T-shirt
Digital-Immorto-Criminalise Your Face (100 max) ($250): Not only a character named after you, but you also get the artist to design a entire character to look like you, all previous tiers of donation rewards - 63 Sold - $15,750
Shake it like a Polaroid Picture (20 max)($500): Same as above tier however you'll be used in a in-game scenario/campaign as well, all previous tiers of donation rewards - 17 Sold - $8,500
Warden Norton I presume? (5 max)($1000): Remember the Civ V world leaders that each bring a special world ability? Not content with your own prisoner likeness, and custom polaroid? Come in at this level and you'll also get to design the warden. There will be five wardens in game and the player will have to choose which one to use each time. One of these will be designed by you and us and have a special feature or buff that we'll work together to figure out. As if that isn't worth the price tag alone you also get....every......other......tier. 6 Sold - $6,000 Oops :)
I think this is a great example of pricing tiers, rewards and how far a community will go to get behind a game they are really truely excited about. Chris the lead developer / only programmer i'm aware of from a 3 person team, even came out and blatently said "we have no idea how long we'll be in alpha phase, quite a long time i'm sure."
Not to mention Introversion although quite famous among cult circles, is fairly unknown to the general population and about as Indie as you can get. At the time they started Prison Architect KickStarter was not available for use in the UK so they designed their own crowd funding model. And in a interview Chris stated that it felt morally wrong and borderline lying, to use kick starter as Kickstarter "mission" is to get a project off the ground and running, and Prison Architect already had been worked on and near an alpha state by the time Kickerstarter was available in the UK.