Here's a rough breakdown based on the default configuration (13 cards/batch, 20 batches/set) and approximate API pricing at the time of writing
With Yorion, Sky Nomad or even Teleportation Circle, Ooze becomes a must-answer threat lest it devour away the opponents entire board
Cons They will only buy it if the card has market demand
Passwords: Yami Bakura | 07119986 Nitemare | 43504084 Shadi | 70592699 Marik | 06987398 Save file (US version): ChronoCC Dark Duel Stories I do not and will not provide ROMs
Since it can be a bit tricky juggling pack opening, running the store, and trading with customers, being able to open packs more efficiently can help players keep their collection of new cards constantly growing
My own bias is to trust my kids to use appropriate language and tell me if someone they are playing with is not doing likewise