The company said:
“Because bitcoin is one of the only forms of payment which cannot be fraudulently reversed, selling bitcoin usually requires some level of trust in the buyer. To deal with this, Get Bits currently leverages the world’s largest ‘web of trust’, Facebook.”
Users can sign into Facebook to view a list of friends that are using the program. From there, Get Bits allows users to gift and trade bitcoin or invite others to the program.
Source: Bitpay Blog