This does look pretty bad for hyper-casual and casual Unity devs. The total earning per install could easily drop into the negative and even with the $200k revenue buffer, it'd be easy to end up with almost nothing. I imagine these folks will just shut their game down around the $200k mark if they see their LTV hovering at or below $0.20.
Wouldn't upgrading to Pro be a better option? Yearly subscription for a seat seems to be worth about 10k $0.2.
Also you're cost per install is almost certainly going to be significantly below $0.2 because every install outside of:
"United States, Australia, Austria, Belgium, Canada, Denmark, Finland, France, Germany, Ireland, Japan, Netherlands, New Zealand, Norway, Sweden, Switzerland, South Korea, and the United Kingdom" (I wonder how did they create this list, e.g. Spain and Italy seem to have a comparable or even higher cost-per-click than Sweden , Austria, Finland etc.)
You're right, upgrading to pro would be better at $2k/seat/yr which gets you a much larger million dollar buffer. Also, I'm noticing that the revenue thresholds seem to be per-game not per org - so actually, the new pricing isn't that bad!