Well, with 1 point given one must be eliminated. It means the people didn't read the rules. Tough luck. With 20.000 points given I'd suppose the same or a strong dissadvantage in the mathematic (even if I get the reward, I'm staying here with only 500 points which is not so much...).
I think that the 3-points people hoped that somebody will not understand or not read the (rather simple) rules and give only 1 point hoping only the "non movers" will be eliminated. Quite risky, but it worked! :-)