Sponsor tile #1 says:
Advanced Side: Do not spend Credits to use the effect of your Trader, Spy, Engineer, or Explorer this turn.
I suspect that the rules are in error and the tile doesn't really affect the Trader, as it does not cost anything to activate, and the graphic for the sponsor tile suggests you ignore the top right "cost" icon at the top of the diver tile, which the Trader doesn't have.
Does this tile really affect the Trader, and if so, how? Does it mean you can buy any resource for free?