By itself, its already okay at 2, but it can be a true Wheel of Fortune effect
Green Green is arguably on par with blue as far as card draw is concerned, although it draws cards in different ways
So anything that alters that number also modifies the amount of HP that you get back
It keeps the format from becoming too large and gives newer cards room to matter
Not rock-solid evidence, cards can be missing in the sequence or get flipped around, but from the same box he also got packs containing the preceding (Nightly Garbage Run - Dark Jolteon - Dark Primeape) and following (Dark Charmeleon - The Bosss Way - Dark Machoke) 3 cards on the sheet, so it looks like whatever was in the Dark Dragonites position is missing from the sequence entirely
However, the $650 price is for a grade 9, near-mint condition version of the Pikachu with Grey Felt Hat card