[watwut]

Not much, except that a.) probabilities of cards with given rarity are well known b.) M:TG are niche product.

[archi42]

Funny things is, MTG cards are produced in Belgium; and now there is MTG: Arena, where you can either earn boosters; or pay for them with real money.

Feels a lot like loot boxes/gambling to me, in either instance. Okay, at least IRL you have a (largely unregulated) secondary market to sell/buy/trade cards.