Those are some interesting yarns but I've given variegated yarns a try and now I'm done - just haven't figured out what to do with them :)
They can be fun. I used half the cones of two of them in the picture.....I have many more cones sitting on my shelves. I love using them as warp with a solid color as weft. Occasionally I've wound a warp with variegated yarns in mock ikat.....some waste but neat effect.
I love your comments - thank you!