User blog comment:EmpyreanSmoke/Finding Crowley/@comment-98.243.104.144-20150124000911/@comment-11331875-20150124034048

The crossroads demon from "I Know What You Did Last Summer" said that he almost hadn't come because Sam had killed the last one, and then with Dar, Sam had to trick someone else into summoning a crossroads demon because demons weren't responding to his summons. I would say that it depends on the summoning ritual used whether demons have the power to decide whether to respond or not, but then, Crowley didn't respond to Sam's summoning in "Do You Believe in Miracles?" Seems like a plot-hole.