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Vikings: To be honest - I don't really know. But isn't a Pond with 16 players and 20,000 points a very different game from one with 160 players and 20,000 points? And wouldn't the latter be more similar to a 16 player pond with 2,000 points?
Also I don't think 150 points is a very smart number to go with. There was a post of BBW which Fencer seemed to like: Run around the Pond (coan.net, 2005-01-11 16:04:41), which suggested a set of predefined values. Of course it might be sensible to set an upper boundary for the bonus dependant on the starting points.
Anyway - I don't know if and how to adjust the rating for those Ponds properly, but I'd rather have those options with no extra rating than be bound to the fixed parameters.