A debugging story about WooCommerce Subscriptions, caching red herrings, and one deliberate line of code that quietly broke a conversion funnel.
The Symptom
A client's fitness membership site offers a 7-day free trial on its subscription products. Simple enough: sign up, browse the workout library free for a week, get charged automatically after — standard WooCommerce Subscriptions behavior.
Except guests visiting the site couldn't see the trial at all. The product page just showed the regular monthly price. No trial messaging, no "$0 due today." And when a guest actually went through checkout, they were charged the full price immediately — no 7-day grace period in sight.
Logged-in users saw the trial just fine. Every time.
