No grace period, no discretion
I cancelled after accidentally missing the trial cutoff, a few hours after my 14-day trial rolled into a paid subscription and asked for the $9 refund. The reply quoted the Terms of Service at me, explained that I had been informed at signup, and declined. They then asked why I wanted the refund, after already refusing it.
I used the product once during the trial to test. The charge was hours old and the account was already cancelled. Refunding it would have cost them $9 and taken one click.
I've run a subscription software business. Missed-renewal refunds get approved without argument, because a customer who leaves with a neutral impression costs nothing and may come back, and a customer who leaves annoyed writes reviews.
The policy is presumably within their rights. It's just a poor read of what a lapsed trial user is worth. I'd have shrugged and moved on; instead I'm writing this.
Reply from ArtPlacer