Live projects: Jumps your project to the top of its Ladder band for 72 hours. More visibility, more testers. Does not increase your review cap.

Archived / expired projects: Relists the project as a full new pack with the same number of reviews as your original purchase - even if all were used. Goes live again, boosted up the Ladder. No editing required.

What it does not do: Add extra reviews on top of your pack cap. Allow editing of the original submission. Work on free tier projects (upgrade to a paid pack first).

Want to change your submission? Buy a new pack on submit.html instead - that gives you a clean slate with full review cap.