You know it can't stop,
@PJS299 . If they lower the yield on the next event, or stop mainlining FP, goods boosts, etc... people will dry up their spending.
The ONLY way they keep the balance is to keep producing higher and higher yields in the events, but quietly (and obviously) make AI changes to the fighting venues to match the general metrics of the upgrade. Only those that buy serious multiples of the event building will see an initial modified boost that's apparent, but 1 added "something" won't help, palpably.
So to us, it's looks like we're making great progress with all the new buildings we get on fighting longer and better, but the progress is fleeting, because... in the background, they're removing some or all of our "gains" with measured intelligence increase imparted to the controls and warriors we fight - by smarter AI design against you - to keep a reasonable balance.
They also know and "degrade" our favorite strategies to fight... 1 + 7 or 2 + 6 (warrior with rogues) use to be a winner - but now? Nope. That's because Inno's AI has reduced the effective value of that strategy. It's still works, but not like it used to. We didn't change it - they did (in the background). They go right for the single warrior now - the defensive AI has new sharp teeth.
talk about inflation though.
In the new Saint Patrick's event coming soon, there is ANOTHER 3 digit boost rate in evidence for the top level (gold) of the Celtic Tavern. 100% Blue shield when you fight in GE 5.
You'll start to more and more 3 digit boost rate this year, I would think. The 2 digit -->3 digit boost rate line's been breached again, and more breaches will start to appear later this year.