PC World's review says:
.. "The program strips Web sites of banner ads and swats down pop-up ads. Its aim is to "deliver near-broadband speeds" at a fraction of the price. That may be a bit of an overstatement, but while using the service we did experience a noticeable increase in speed over a dial-up connection. The latest version (2.4) puts data closer to your PC, with a network of servers strategically positioned around the United States.
...
"Although the folks at Proxyconn say it's a free trial, you do have to submit your credit card number before registering. You have seven days to try it before your card is charged."
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Note that part of the so-called speed improvement is simply blocking banner ads & pop-ups, which is something you can get freeware for.