At one time I think it was worthwhile. For a time I was making decent money there. But lately I'm making less than half of what I previously made.
I've also recently stopped uploading there as better options have become available. I'm not really motivated to go through a more involved upload process just for 33% of some pretty badly-priced products when I can go elsewhere, get a better percentage, set my own prices, etc.
My vote on GR these days would be a solid "pass".