If 1 pac costs  $0.0004, and if Y = 10,000 pacs, then the total cost is $4.

So, after redemption by 1000: 1, the equation is:

      Y pacs / 1,000 = total price / 1,000
or, 10,000 pacs / 1,000 =  $4 / 1,000
or, 10 pacs = $0.004
or, 1 pac = $0.0004

So the price/value per pac will be same.