Except there's no fee for the first 200k installs, so the Unity fee is only $10k for the 50k after the threshold.
You could also have saved $8k by upgrading to Unity Pro for $2040, though of course you run the risk of paying for that plan and not selling 250k units.
Unfortunately the blog post is so poorly worded that I'm not sure after that. My reading, too, is that once you reach the threshold, you pay for those first 200k installs, too! The table says 'per install', not 'per additional install' or anything like it. Not sure though.
