Upstore operates on a "Pay Per Download" (PPD) affiliate model. Uploaders earn money when free users suffer through the slow downloads. Leeches bypass that suffering, meaning uploaders didn't get paid. Major affiliate networks threatened to drop Upstore unless they proved they could stop "spam leech traffic."
The Downfall of Upstore Leeching: Why Your Favorite Generators Are "Patched" upstore leech patched
"Don't bother looking for a new leech tool. They patched the cookie generator. It’s over." – Upstore operates on a "Pay Per Download" (PPD)