100% correct. Multi-market economic discrimination based on self-selection by time of purchase - 95% of those who would have ever paid $20 have already purchase

100% correct. Multi-market economic discrimination based on self-selection by time of purchase - 95% of those who would have ever paid $20 have already purchased the game, others will now pay less than that. They could have as well just dropped the price to $5, but they would have never got any free PR without this stunt.