Let's Speculate
The only thing I'm really ticked off about is that the information from Tesla has been really slim and scant this week.
Tesla is playing this close to the vest so we will just have to guess at what might be happening behind the scenes. They seem to be in a cost pinch.
First, the forum reported months ago that Elon stated that the roadster costs were underestimated.
Second, along with the spike in oil prices came an overall increase in material prices.
Third, Tesla doesn't have the volume to negotiate steep price discounts.
Fourth, The roadster is still hand built and I doubt that they have realized much of a cost reduction from increased production. They have certainly reduced overhead expenses a bit, but not overall man hours to assemble a roadster.
Fifth, if anything, the total cost of material and labor has probably increased over the last few months.
Sixth, I'm not sure of the impact of the dollar vs euro valuation has on all this. Some one will have to fill that in for us.
I'm guessing that the Sport option was simply a way to increase the roadster price without a significant increase in cost to Tesla.
They are apparently in rough shape with costing right now. I would hope they soon give us a better explanation of why this move is critical.