There are four reasons we have a CAN token:
CanYa tokens will be used for our Hedged Escrow (to maintaint the job value when a job is booked).
They will be used to incentivise new adopters to the platform (via our rewards pool).
They will also be required for service providers to promote their own profiles (like a freemium model - to provide further revenue to the platform)
They will eventually be the mechanism and economic incentive for how the CanYa DAO is run (similar to DCR in Decred or DSH in Dash).