Kristijoy, I'm laughing at your fussy cut "go green, go white" pieces! Wow, you're good!
For leftover fabrics, the person who made the block generally gets to keep the scraps... unless the sender has a special request to have it sent back. I think I only saw one of those in this group (the Kaffe fabric), so keep an enjoy your leftovers.
Once in a while someone will screw up their block, and then post an emergency request to see if anyone has some of the fabric they need to make another one. It's nice when someone does!