My recent experience with SS is that a lot of my newly accepted photos get sold for the first time blazing fast (from within few hours to few days), however after that there are no sales of these assets at all. Which makes me suspect that there's something strange in this pattern. For a pure coincidence there are just too many examples with my portfolio like this, with the most recent being earlier today.

Anybody else with the same experience?

It happens to me the same, also. In the series of last images uploaded, in the same day or the next day a few (not even the best one) are sold. And then, from that batch, no sells, absolutely nothing. I notice this for at least 2 months