The first rule of any successful team is leadership. Smart-sourcing embeds a leader with the team for real-time relationship building, access, co-discovery, problem-solving, quality assurance and delivery.
It isn't a cost-cutting exercise. There are significant economic incentives when your approach with an experienced partner is from an investment perspective, not strictly a financial play.
Equal parts adventure and minefield, you must have cross-cultural knowledge. Think about it. Your C-team gets lessons in greetings, the exchange of business cards and key cultural interactions.
When accountability is abdicated to the development partner the results is the same. Late or failed delivery. Smart Teams have leadership accountability built in from the planning and kick-off stage.