The author seems to misunderstand the new pricing model (as did many others; this is Unity's fault) [1]
The $0.20 is not retroactive, nor do you need to hope your users see 10 and impressions to cover a cost to the game developer -- you need to earn $200,000 _and_ have 200,000 installs. A free game would not be charged, and if you don't believe you can muster 10 ad impressions per user (to cover the unity install cost of $0.20), the base cost of the game can be increased by < $0.01 across your 200,000+ sales starting next year when the policy takes effect on new installs.