I find it much easier to see the status of my shops on their new hub. The Dashboard page has a status box, with separate boxes for Scheduled; In Process; Attention; Requested; and Rejected. Each box has space for the number of each. At a glance, I see status and progression.
I have never known them to email a shopper when an assignment is rejected. They maintain it is the shopper's responsibility to watch the status of their shops.
Fastjack, they will communicate, via email, when clarification is needed, in addition to updating the Dashboard. That's an opportunity to fix things. For rejected shops, just because they don't contact us, doesn't mean we cannot contact them. I have gotten rejected shops accepted, and STN has been approachable.