free proxy list

[Proxy Site List]

Yes, free Proxy Site list can be exceptionally stable and they're usually faster than the free ones.  They are vastly superior to the free ones when they work.  Looking at the failure modes, however:
The free ones resolve backwards to something with "proxy" in it or "proxyprovider" like http://proxysitelist.net/. so they can be blocked en masse.  They're also in a block of IP addresses, they're scattered throughout the world one at a time.  If one gets blocked, the bot gets disconnected, notices it's disconnected and exits.  The Director launches it with a new proxy.

[Proxy Site List]

People usually use proxy to filter searched web content, to keep anonymity online while browsing, to avoid security restrictions etc. Proxy can help you with hiding with, your IP address which is a good option in case if you want to browse with a hidden IP and keep your private surfing secured.