In their Q&A thread the other day I believe they said that helium price isn't likely to impact them all that much in the short term. Maybe they'll use hydrogen

In their Q&A thread the other day I believe they said that helium price isn't likely to impact them all that much in the short term. Maybe they'll use hydrogen at some point in the future, but it seems like they don't think it's necessary for their business model to work, given the relatively small size of their airships.