Hi, short answer: NO. I told that guy I'd personally refund him since he wasn't eligable for a trial.
OSBot handles refunds and you'll get one if the script does not hold what it promises. For example if I tell put "this script is absolutely flawless and does all agility courses" but then half of them are broken and I don't fix them, then you'd get a refund. An example of a non-refund is "omg this script got me banned".
However, to avoid confusion and unsatisfied customers, I offer free trials to all of my scripts so that you may try it before purchasing.
Hope that answers your question,
Khaleesi