A free Gumroad download that solves the whole problem converts at ~0%. You need a named gap.

My ladder for shop owners:

1) Free Ops sample (pick & list) — https://billysizzle3.gumroad.com/l/wbhhb

2) Still missing: public 1-star / late-ship / wrong-item replies

3) $1 Review Reply Kit (10 prompts) — https://billysizzle3.gumroad.com/l/ndfwvy

Steal this public-reply prompt:

Here is a 1-star review: [REVIEW]. Facts: [WHAT HAPPENED + MY POLICY]. Write a public reply under 80 words: thank them, name the specific issue, state one fix I allow, invite a private message. Never promise anything not in my policy.

Put the $1 link inside the free file (top + bottom). Gumroad Discover won't save you before ~$10 in real sales — the ladder has to do that work.