I'm not disputing anything else you've said, but how did you decide that you'd got your $5 after 6 months? I wouldn't have the first clue how to go about decid

I'm not disputing anything else you've said, but how did you decide that you'd got your $5 after 6 months? I wouldn't have the first clue how to go about deciding at which point in time I got my money's worth.