The leech site uses its own premium account to fetch the file and then passes the data to you.
While Keep2Share is highly popular due to its high-quality content and security, its free tier is notoriously difficult, limiting speeds to ~50 kb/s and imposing long wait times. "Leech" services bridge this gap by using their own premium accounts to fetch files for you. Top Keep2Share Leech & Debrid Services keep2share leech
A Guide to Keep2Share Leeching: Benefits, Risks, and How It Works The leech site uses its own premium account
: A popular choice that provides a mix of free and premium tiers for high-speed downloads from various hosts. Top Keep2Share Leech & Debrid Services A Guide
Instead of paying for just Keep2Share, Alex paid a smaller fee to a service that supported K2S along with dozens of other file hosts.