Why proxies always die quickly

[Terry]

When you use a proxy, you are using the resource on the proxy server such as its CPU and memory. If too many people use the same proxy, the proxy server will exceed its limited load and go down. If a proxy can be found easily, it usually dies very fast.

You should check whether the proxies are still working before using them. Our software can help you to test and use the proxies.

For HTTP Proxy: http://www.eliteproxyswitcher.com
For Socks Proxy: http://www.socksproxychecker.com

[Katmando]

That certainly could be one reason, but the constant testing of these lists by hundreds of thousands of people day end and day out would be a bigger one.

The people who post proxy lists, pretty much all leech them from the same sources (each other mostly).  They all post them to several forums like this one, and the people who wish to use them test them repeatedly.  

Few proxies are operational 24/7, so some proxies that appear to be "dead" aren't in reality.  They just aren't non-functional at the time of your test or desire to use them.

[Terry]

You are right, Katmando.
Thanks for the supplement.