I had quite a few from my travelling days with Telstra saved up. Also we had 4 people's worth of 2 return airfares to LA which we combined together. I also use Credit Card, but don't spend way near enough to make it worthwhile. Unfortunately this might be our last award flight for a while.I think you did well booking for four.
My calculation says 384,000 points, how long did it take you to accumulate them.
The internals we also paid for.