The thing that makes gachas terrible isn't that the companies sell extras to their games, it's that the companies sell you only a chance of getting the things you actually want and get you to gamble. The care packages are all preannounced and contain exactly what they say they will (plus the letters, which are a neat little extra).
With regard to paywalls, he's said that the story will always be available for free and the stuff in care package are pure extras, like bonus menus on movie DVDs. I agree that if he started paywalling a story that has always been available for free if you're willing to wait two weeks, that would be bullshit and I would probably pull my support in protest.
