[Edrahil]

Wrong, please read, I stated "Was the cost of blocking the 15 hatchery 100 or 200 minerals" I did not say i lost 200 minerals, rather because of the pylon block, there are 200 minerals I can no longer use.

Here is the issue:

To do a pylon block, I make one pylon at the zerg natural, it dies after blocking the early expansion. I had spent 100 minerals towards that pylon block and thus have 100 minerals less than what I had originally. The pylon gave me +8 max supply while it was alive, and I could have used 8 supply that it enabled me while it was still alive, by making units.

Since that pylon was sacrificed, it has to be remade. This means that I spend another 100 minerals. The supply that this pylon gives me will serve the same purpose as the first pylon, and the supply that I haven't yet used I can now use with this pylon. The amount of supply used up on the first pylon will change the effectiveness of this pylon (If I didnt make any units while the previous pylon was sacrificed, then the second pylon will be more effective in giving me supply). Unfortunately, this doesn't mean you will be better off, if you make no units during this period, you will more likely be behind.

Now, if I spent 200 minerals in total on both the pylon and the replacement pylon both of which were required for this form of expansion blocking (whether early or not), then that is 200 minerals that I now do not have. It is not 200 minerals lost, as you still have the second pylon built. But its 200 minerals you can no longer use.