I have only been in one siggie swap, original deadline was June - thought I'd have a fun summer project - deadline kept being extended so I finally received blocks 3 days before I had to return to school. I love the blocks I received but they are all still in the baggie.
I have seen a few other swaps I wanted to join but machine embroidered blocks were accepted and I wouldn't want any of those.
Swaps are fun but read rules and be open to change.