Upgradable Piggy Banks: Long-term Monetization Layer?

I see a bunch of games testing upgradable piggy banks, and it’s an interesting take on a well-known mechanic. 🐷💰

Instead of a static one-time offer, these piggy banks level up after each purchase, increasing their storage cap and giving players more incentive to keep breaking them.

Below are two examples from Candy Crush and Legend of Slime, each adding its own twist. Curious to see if this becomes a more common long-term monetization layer!