OK, if marrying sisters is enviable (and I agree that it is), I fail to see any train of logic that would identify marrying cousins as unenviable. Depending on one's predilections and biases, one might promote more or less points for cousins, but surely one wouldn't need to be
punished for it!
Personally, while I find the point system amusing, I think if one were to take it entirely seriously something closer to 100 points should be the maximum. I just checked the 'standings,' and 1000 points would vault anyone with biological sister wives up to the top without otherwise breaking a sweat.
Of course, maybe I'm misinterpreting the motivation. Is James (or The Revolting Man) asserting that being married to two biological sisters some kind of tremendous
burden? I have to ask, because, from the outside, it appears to me to be otherwise -- and, by the reactions I heard and otherwise observed from other men at the retreat, it seems pretty clear to me that the envy factor is much larger than the notion that anyone wouldn't want to be in James' shoes.
Therefore, all things considered, I'd encourage 100 points for sisters -- 50 for the accomplishment, and another 50 for properly avoiding the vexxing dynamic -- and 50 points for first-cousins, 25 for second-cousins!