A reprinted staple from a recent set and its original printing can sit at completely different values, and a foil can multiply the price of an otherwise common card
There are some good Youtube videos that try to put the story together from all the various card arts and theres no definitive right/wrong answer
It is evident that the extra card has a minimal effect on draw probabilities, especially past the first three or four draws
There is also an emphasis on time and the future in most "Destiny HERO" card effects, as opposed to the more immediate effects of "Elemental HERO" monsters, with many having effects that trigger/resolve during the Standby Phase, interact with the top card(s) of the Main Deck, or take effect over multiple turns
Paleozoic Canadia Good cards, it allows you to delay when you do not have access to your "Red Eyes" cards
This has been erratad on the French version of the app