The three Vending Machine Series (1: Blue, 2: Red, 3: Green) are originally referred to as “Expansion Sheets” in Japanese (拡張シート). This suggests that the series were not promos per se but actual expansions.
They fall under the category of “Special Expansions” (e.g., Southern Islands, Poké Card Creator Pack, Pokémon Rumble, Dragon Vault, etc.) rather than a “Main Expansion” (e.g., Base Set, Jungle, Fossil, etc.), “Black Star Promo” (e.g., ADV-P Promotional cards, PCG-P Promotional cards), or “PLAY/PPP Promotional Cards.”
The other piece worth considering is, “What is the main purpose of the set?” Is the set promoting something? If so, maybe you can consider it a promotional item, but it is not an official “promo” if that makes sense.