How do you solve the information asymmetry problem in crowdfunding?
By having lead investors who then syndicate their investment with the crowdfunding public.
Lead investors typically have the background, experience and reputation for picking good investments and are technically able to perform the necessary and possible due diligence (since many of them are located in Silicon Valley).
Investors get to rely on this work and entrepreneurs are able to deal with sophisticated investors who understand the marketplace. A win for all involved.