US shopping miles tend to post on Thursday. Some signups post, others don't (ever). I signed up for grins earlier this week to see if the miles would actually post. Didn't see any miles post yesterday. Not surprised to see it gone. Blogging about or posting a deal like this to the masses is a sure way to kill it. Sometimes I wonder what people are thinking. There was another one a while back that provided more miles with each signup (and actually worked). Dead now, but at least it died a natural death.