Hey guys, I have finished the game already and I only got 4 cards for buying the game, how can I get more booster packs ? or How often do they drop?

(Spoiler warning for anyone who hasn't played the game) the end is a little ominous, even though it's all magical and mystical.. We know Fran is dead, it basically confirms it in Little Misfortune, but how she died could be debated, was it really when she was shot? Did she die in the forest in the cold and was in the afterlife, not able to realise what happened to her? I don't know, my theory, (there's probably others out there) is that after her parents were killed, did she get taken to the hospital and out of trauma run away, with her pills and overdose in the forest? Did she murder her parents and get shot by police on the scene and not be able to pass through and was stuck in purgatory? Was she in a coma and passed away? Did she suffer hallucinations triggered by trauma? I don't know, I saw a let's play of it by jacksepticeye years ago and I'm watching it again and I remember being really confused about the ending, IDK maybe I'll get a better idea of the ending after finishing the let's play again, or maybe I'll still be just as clueless. Sorry if this makes no sense, Just a fan being a fan :D