That is a lot more common than you think. When a stadium has a capacity of xxxxx people, that is often simply an approximation, a rounded figure. Suncorp Stadium for example, in Brisbane, is said to have 52,500 seats, but in reality, there is 52,442 or such seats. It is merely a more convenient way of presenting the data.Huh? What do Americans have to do with the capacity of this stadium???
I am also intrigued by the "perfect" number of 150,000. I highly doubt that is the real capacity.
Secondly, 150,000 is a relatively reasonable figure for a round stadium the size of MD Stadium. For comparison, i present a relatively similar sized and shaped stadium, the MCG
That there is a capacity of 100,000. It has 71 rows, while May Day has 90. May Day has stands much further away from the pitch than MCG, and May Day, from what i have seen has less seating room, meaning far more people are seated in the May Day's outer sections than at say the MCG. 150,000 capacity is far from unrealistic.