Well, this is a bit of an interesting post. These cards make me wonder if I should consider these inserts, or just inserted into packs.
These however, definitely packing material, which is alright too. Good for sticking in a PWE to support and protect cards in trades. These I consider just to have been inserted into packs, which the dummy cards are, rather than really being "inserts". Does anyone actually collect these? They do have a few different ads on the back with these ones (there are 6 different backs in this bunch).
Not a bunch of cards I was necessarily expecting to pull - but useful still.