Automatic Monkey :
During my five days in Vegas, a couple playing at the Cannery and the rest at the EC downtown, I saw only one player backed off and that was at the EC. He was spreading $10 to $50. It was early in the day, the pit boss was young. I played a couple of more hands, then left.
Maybe my even tighter spread regardless of my playing decisions as the count moved marked me as not worth the trouble. I'm in Vegas not to make serious money, but just to beat the house, meet strange people and collect stories to tell like the guy who lunged onto a craps layout at the EC, grabbed $19,100 in chips and fled. I was asleep upstairs.
Thanks for your perceptive response to my question.