I thought you were going to by decks and hold them. I didn't realize you were going to open all the cards. That's interesting. I bought one CL pack for $4... the cards are worth something like $0.30 so I reconsidered whether I was going to buy more, and decided not to. I can say Splinterlands is way harder than it was when I used to play it years ago.
Just talking about this in a chat. This is the thing - even opening 100 at a time, there were a few that were 50% loss. However, I bought 3900 packs = 15600 dollars worth at $4 a pack (I paid a lot more for vouchers early on) and the total current value is 18400. This includes all the drops and blight, so it is likely about even overall.