How much credit do I get toward the Master Key?

Exactly what you actually paid for your app lifetime — not the list price. We read your real payment, so if you bought at a founder rate, with a discount code, or with unused subscription time credited in, your number reflects that. Example: you paid $169 for a PatchForge lifetime, so your Master Key is $419 − $169. Sign in and the Master Key card shows your price before you commit. It never goes below $1, and it is a discount rather than a refund — nothing gets clawed back. One timing rule: the credit runs for 12 months from your lifetime purchase date, so upgrade inside that window to get the full amount.