If room rates continue to go up each year the number of points earned on a constant number of room nights will increase over time. Five years from now we might expect that a $200 per night room rate will be considered very cheap. The average might be $350. If that is the case you would earn 13 points per dollar or 4550 points per night. In other words inflation will make the points easier. The 1,000 nights will remain hard to achieve.