Joivey - If,it were me I would run screaming from serger thread for any use other than in a serger. I use prewound bobbins for machine embroidery unless the back needs to look like the front - as in free standing lace ornaments, etc. We should use the best we can afford in fabrics and threads. Inexpensive thread will come back to bite you. I'm not a thread snob but to me it's worth using the best I can for my projects - whatever they may be.
Sandy in Mooresville, NC