Satin is quite nice for quite a few different subjects - I've used it in the past for the postcard exchange.
One thing it is really good for is scanning - for some reason, satin surface prints scan better on a flatbed scanner than glossy, pearl or more textured surfaces.
And for those who aren't receiving enough acknowledgments, I'd recommend persevering. The last two years have been draining in many, many ways.
I'm trying to get to my comment backlog in at least Round 53, and so far I am up to date in Round 54.
Ah, considering statistical data of the last 3-4 rounds I thought that anomaly to be a postal failure.
P.S. I've just recollected that I might have some minor comment backlog dating back to Round 50, which was massive.