It was a couple of hours of time commitment back in the aughts where you did a before & after timed computer test under the influence.

I suppose for a multi hour inclusion that makes more sense, that's also a study that isn't going to get huge sample sizes so their budget for paying can dole out more.

And your attitude into it is another reason why these things are so weak. Very few people are taking them serious, and often in it for the hot Psych undergrads running it, so their answers are usually pretty underthought or unrevealing.