"Goodie Bags" (Portals) for Wearables

I've thought it would be interesting to use Chainlink VRF and probabilities to generate items, instead of a set number per release.

The initial thought was to have what I'm calling a "Goodie Bag" of Gotchi wearables-- what inside isn't known until opened. Each Goodie Bag would contain 5 wearables of varying rarity. Unlike portals where you have to choose one Gotchi, i was hopeful all 5 wearables would be claimable. There could be a "minimum included rarity" so that all 5 items are not commons.

There's a couple ways to do this through probabilities-- using a "stacked deck" approach, where th…