Like banks do with money, they have an X capital and lend (or buy bonds) for 10000X. Only difference is if Dropbox fails, the tax payer isn't gonna pay the mess

Like banks do with money, they have an X capital and lend (or buy bonds) for 10000X. Only difference is if Dropbox fails, the tax payer isn't gonna pay the mess indirectly... He will lose the data.