Tuha highlighted above an approx. amount of donations received for OMF. I would like to highlight that the Microbe Discovery Project, in the first initial crowdfund the amount of donations was approx. 1350 donations, in saying that I would also like to highlight that the main thread that kicked off the crowdfund got well over 50,000 views in a very short time frame.
That does seem like a huge discrepancy between donations and thread views, and it would seem to imply that only 2.7% of people who viewed the thread donated. However it worth noting that a lot of people will have viewed that thread multiple times as those are not unique IP visits. The real percentage of people who viewed that thread who then went on to donate will be much higher.
As I know telling people you've donated increases the chance they will donate, I would just like to add that I chipped in to Lipkin's study and I will send a donation to the OMF when I get my next benefit payment!