Satinisation adds a whitish finish to things - this doesn't look good on dark colours - it washes them all out.
Pastels are all washed out in the first place.
I imagine folk who prefer dark/deep colours don't actually want them all pastelised, while, as it doesn't affect pastels, it doesn't affect those who prefer these.
I've got a bit of "black" satinised glass - it's a dull, dusty-looking grey.