could they be curating only best sellers? (and by that promoting them even more...)
Could they be favoring some contributors over others?
Well, obviously any site would favor best sellers because that means buyers need those clips.
By the very nature of a curated collection, of course some contributors are favored over others. But it's pretty great when YOU are among the favored.
You can also see that they have almost only membership clips in there, but maybe this will change as the new split comes in effect.
But all in all, I would have to agree with you that the selection wasn't the best, but the staff can't possibly have a good grasp of what's in the entire, at this point quite large, collection of clips.