You're referring to JetLeech 2, a high-performance, open-source, and highly-configurable TCP/IP stack for embedded systems.
The immediate fallout of JetLeech 2 being patched has been felt across forums, tech subreddits, and private sharing communities.
Paid multi-host down-loaders (Debrid services) have largely taken over. Unlike free PLGs, these are paid services that use robust infrastructure to continuously buy and cycle premium accounts, making them harder for file hosts to completely block.
The Fall of Premium Link Generation: Analyzing the JetLeech 2 Patch