Apple gift card promotion

Aside from if there’s a redemption limit and what exactly is meant by the $25/$50 worth of crystals (are we intended to spend the card on crystals to get the bonus items?) I’d also like to know how we’re supposed to go about redeeming the offer if it’s not buying crystal packs. Will there be a code or information on the receipt or what? Also in parentheses underneath is says (Participating stores only), is that for legal reasons because some people won’t be able to process the fact that it’s only at Target as stated or will only certain Target stores be participating? @CG_Tusken_Meathead could you please let us know?