I hope this isn't in the wrong place, lol!
What do you guys do if you place an order for delivery or pick up that includes a 'must buy 2' rebate, but they were oos of one of the two items? Usually they're a bit higher priced item.
I haven't been caught in that spot, but I would guess the best bet is to request that items related to offers have no substitutions and presuming you can type in comments, ask that they please do "all or nothing" on the quantity for multi-item offers.
"OOS" means "out of stock".
I presume that's what you thought was a typo, nothing else stood out to me when I read the question (or maybe it was edited before I read it?)