The problem is that the reason that his project was popular with people on Kickstarter was likely that he created the perception that the chances that his project will result in a working drugs is much higher than it is in reality.
If it was a tax deduction if it failed, but allowed for a gain, then it might be a way to do projects that were popular with people, but not attractive to Big Pharma or VC.
Big Pharma can make billions from this project if it works. Big Pharma also has a lot more expertise in judges the likelihood that it works than random people on Kickstarter.
If you take research on a new way to do exercise that inherently can't be patented then there can be a high chance that the research will create a lot of value but there's no business model to turn that value into money for the inventor. That's not the case with DRACO. Big Pharma is in a good position to assess whether it's a worthwhile investment of resources and put money into the project if they think it's a worthwhile investment.
Actually, Big Pharma would LOSE billions if it works. There are only a few anti-virals, and none of them work well, and most need to be used in combinations.
This is also not a blue sky hunt, he has a mechanism, and just needs to fine tune the hydrogenation or delivery method.
from Wiki "DRACO is selective for virus-infected cells. Differentiation between infected and healthy cells is made primarily via the length and type of RNA transcription helices present within the cell. Most viruses produce long dsRNA helices during transcription and replication....