A common reason why is the phenomenon many fans have come to refer to as Time Compression, in which after Disc 1 things seem to start happening arbitrarily and make less sense
The Magic: The Gathering and Final Fantasy crossover was already a phenomenon before launch, setting a sales record just with pre-orders
They cant be opened in Promo Packs, Value boosters, or any of the other booster types out there
Nope, me neither, and thats because it has actually been removed from old cards through errata
I would really have to try it out to see
Even so, finding the best place to buy Pokmon cards can be crucial if you want to ensure you arent paying too much for your must-have card - or, worse, potentially ending up with a fake in your collection