Crowdfunding site Kickstarter has collected over $40m in funding for projects

Funding pledged per month (not cumulative)

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"Total Dollars Pledged: $53,107,672
Dollars Collected (successful projects): ~$40 million
Dollars Uncollected (unsuccessful projects): ~$7 million
Live Dollars (currently funding projects): ~$6 million
Collection Rate: ~85%
Kickstarter operates on an all-or-nothing funding model where each project’s goal must be reached to be funded. This pie chart is a great window to how this has worked.
Of the $53 million that has been pledged, $40 million has been collected by successfully funded projects and $6 million is still live (meaning pledged to projects that are still funding). The remaining $7 million is the amount of money not collected — pledged to projects that did not meet their funding goals.
Still with us? Of the $47 million pledged to projects whose funding has ended ($40M collected + $7M uncollected), approximately 85% of the funds ($40M) were collected. This 85% collection rate has stayed quite steady over the past two years. It’s safe to expect that 85% of the $6 million that’s currently pledged to live projects will also be collected."

Source:  Blog post by Kickstarter, 28th April 2011