I have always gotten mine from a wholesaler, so I usually have 10000 yd spools of all poly stuff. Can't say I am overly worried about my thread, either.
Before I got into sewing for a living, my machine was a 66 Singer treadle who does not like Guttermann thread at all. Matter of fact, it would prefer never to sew with a plastic spool if it could get away with it, so I started rewinding thread onto wooden ones.
I personally don't care if it is recycled or not. If it is available, fine.
My problem is this:
My machines don't like the Guttermann spools, some don't like the thread.
I need more then 100M for any project
I pay one pound more for 10K yards of thread, and would need 2 of the Guttermann
Don't care for brand named thread or not.