If I was sitting at home and had 2 hours to wait, then the $4 might be attractive. But those 2 hours currently represent lost opportunities for me. Trying to do these while driving around is dangerous, and invariably they call back when you can't talk for one reason or another. I do a shop for $2.25 because I can do it when I have time, and because I know that it will take less than 5 minutes from making the call to reporting it.
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008