1.1 the airbnb platform is an online marketplace that enables registered users -lrb- `` members '' -rrb- and certain third parties who offer services -lrb- members and third parties who offer services are `` hosts '' and the services they offer are `` host services '' -rrb- to publish such host services on the airbnb platform -lrb- `` listings '' -rrb- and to communicate and transact directly with members that are seeking to book such host services -lrb- members using host services are `` guests '' -rrb- .