Sometimes it's cheaper for investors to pump money into a new company than try to buy into one that has already gained traction. For $25mil they might take 80% of the company. If they gave Dwolla 25million, they might get 10%. If investors believe the technology will be in demand in the near future, gambling $25 million for a slice of that pie is a no brainer.
tl;dr - One screenshot, loads of investors, no synopsis of the app at all really. "Wait and see".