I got 3 of everything in this box with nothing but gems a long time ago. I do buy structure decks and sales in this game, but cards like this are easily obtainable for F2P...
Also if you're gonna focus on any one box, I reccomend this one as it has a lot of great archtypes available. Then you can grab purgatrio when you're done. Invoked is splashable with many rogue decks and archtypes.
In reality, F2P players are never supposed to buy more than 1 time the same box.
When you go through a box the first time you get 100% return on investment because you had none of most cards before.
When you buy the same box again you are getting only 15% return on investment.
Gems are not free, they cost time. Farming too much in a "F2P" game can hinder your studies/career which can cost money.
it depends, going 3 times on the same box can give you a fully self-sufficient deck as opposed to spreading out through a bunch of boxes with incomplete archtypes
In that case you will never get your hand on a Wall of D, Drowning, Canadia, and other staple cards.
F2P players would get a greater variety of generic supports if they buy each pack once. When the meta changes they will be able to use the appropriate one in the same deck.
Buying the same box x3 won't give you a complete deck either. For instance Purgatrio and invoker are from different boxes.