Makes sense to me not including those plastic scoops. Consider every box of Tide comes with one, and if one is brand loyal what does one do with all those scoops? As a new one comes with each new box, one eventually chucks the "old" away, waste.
When we purchased our first front loader, and then a box of Persil, there was no scoop included with the detergent. Contacted Miele and they sent us two "Persil/Miele" detergent scoops, and have been using them ever since. Also have a "Dynamo" detergent cup which is ages old. It came with free samples of the detergent being distributed to homes in our area when Dynamo was first being rolled out. Those where the days, every home in the area got a full sized bottle sample, and as some women wouldn't bother with liquid detergent was able to nab several bottles.
Consumer Reports noted many detergents including Tide that offer free scoops play tricks. They make the scoop slightly larger while decreasing slightly the size of the box. All this without changing the recommended dosage of detergent. Net result is one uses more detergent without even knowing about it, provided one follows directions printed on box.
Launderess