I wasn't using Trainline because they charge booking fees and I can only speak about my experience that happened in 2015. Since then, the fare has risen above the threshold, but below is a similar fare on the same line. Notice how it doesn't say anything about time restrictions. Only someone who has read the railcard's fine print would know that it shouldn't be used in the morning peak, despite it being called 'anytime'.
Whenever I book with the trainline, my ticket comes to £12 before 10. After 10 it is £11ish. And the original ticket price is the same!!!
Well all of the online booking websites said £11 no restrictions and the hundreds of great northern ticket inspectors and gatekeepers did not say there was a problem.
The 12 pound rule is always enforced. If the fare should be lower they charge you 12!!
Fraud/theft of services requires mens rea.