Thank you for the analysis! Love the idea of the passes. People who want more fun can have it for only 47 $GODS + a chance to return a part of this crypto or even make a profit.
Quite affordable if you play in top tiers with a few diamond cards.
I personally choose the free mode since I am focused on saving $GODS and have limited time for GU lately - just trying to play 10 times a day, honestly. Although I recently made 4 cards shine the purple in my favorite deck without hope they'd pay off - so, I invest $GODS in fun too sometimes. :)
In this case you should consider the Premium, You get 90% of the $GODS back. Finding the rest with the BP packs should be possible.
I recommend trying for this first month and see how it goes. You get the mana wheels and the new emotes. I expect the Premium tier should be easy to go infinite if you play 10 games a day.