WASHINGTON — The tiny Pacific nation of Palau — a former filming location for “Survivor” — has agreed to take up to 75 third-country deportees from the United States who don’t have a criminal record — in exchange for a $7.5 million grant to support the roughly 18,000-person island chain. The $100,000 per-deportee fee, announced on Christmas Eve by Palau’s President Surangel Whipps Jr. and the US embassy in Koror, introduces one of the most favorable venues yet for deportees if their recalcitrant homelands — such as China, Cuba, Russia or Iran — won’t take them. “Palau and the United...