[kiryandil]

Alex Christoforou explained it a while ago as this:

The storage is about 20 percent of the total gas needed for the winter.

So, if it's 75% filled, you have 75% of the 20% needed - or 15% of the total needed for the winter [with no outside inputs].

At 100% full, you only have 20% of the gas you'll need to get through a typical winter.

Math is hard. When you're a Zeeper, it's harder. So let's not burst the Speedster's bubble with Da Facts.      

[Its All Over Except ...]

And how do they expect to control exactly how much each person uses so that demand will never catch up to and outstrip storage?