Yeah, the tips get divided whenever someone leaves for the end of their shift. Though when we open, if we get anything, we take it out before the next two morning people come in for their shifts. One time someone was really nice and left me a $5 bill and I was the only one working in there at the time. ^_^
Yeah, we have a square jar with Subway logo on it. For some places, they might not have anything though. Just look around the register and you can usually see if they have a tip jar or not. ^_^
I don't think there is a set rule but it probably is more polite? It's not my thread so I don't want to be rude...you can always drop into my threads to chat...