Tipping in Clipperton Island is probably the last thing on your list of things to worry about. In fact, if you got to the island as a tourist you would have a story to tell! The island is owned by the French and is an overseas territory. It is a protected island due to its fauna and small wildlife. The only possibility of visiting is through a charted ship or liveaboard for scuba diving. Even then you wouldn’t be able to land on the island only anchor off shore!
If you do get the opportunity to go the tipping wouldn’t be a concern! There isn’t any services on the island and it is uninhabited. Have fun though! Its a once in a life time experience!