While I’m not happy with Stern quality or practices & don’t buy their games anymore, your premise reeks of entitlement. You feel entitled to buy a Stern game & profit later. You’re not owed that from any new product. Collectibles become collectible organically due to the passage of time. Time will tell if something is appreciated & desirable years later. You can’t manufacture collectibility, despite marketing and hype.
You’re comparing a hobby and a business. What you do: play games, fix up broken games and sell them for more, that’s a hobby. What Stern does is a business. Your interests are not aligned. Too often people who buy new games consider the new pinball companies part of “the hobby”. They’re not.
As for Vaults, they’re fair game. The only games promised to be limited are Limited Editions. Iron Man was never an LE, no one has a right to expect more can’t be made.