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Unity has changed its pricing model, and game developers are pissed off
(www.theverge.com)
This is a most excellent place for technology news and articles.
Can't wait an indie developer to go bankrupt because the super secret algorithm counted updates as new installations and the developer gets billed multiple times for their whole player base.
Or a rival developer, troll, corporation, etc just runs a script to uninstall/reinstall someone else's game over and over and over again costing them an insane amount of money.
Why bother actually installing? Just use a packet sniffer to find the data being sent to Unity and replay it in a loop. You could probably hit somewhere in the range of 100k-1M "installs" per minute.