Undocumented and/or hidden changes that were left out of the Patch Notes.
As you all are quite aware Kinkoid isn't good at communicating and quite often they implement changes that they don't include in the Patch Notes. We can only guess about their reasons of doing so. But it's the fact that those changes are made and there's not even a word about them in the Patch Notes. This thread is specifically created for the purpose of finding them, keeping track of them and discussing them.
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Thanks, I was puzzled by @Pelinor's comment in the official thread (which was, as my gut feeling was telling me, incorrect and misleading). Nothing has been raised "tenfold" or otherwise. They just removed the cheapest button and added a higher cost button, while keeping two out of three unchanged. And clicking the new button once is exactly the same as clicking the 10M button 10 times.
So... yeah. Very minor and arguably positive change (for those who get trapped by this contest format). F