It may sound like a simple question like asking for paper or plastic bags at the grocery store. I have tried both and I definitely have a preference.
The answer is simple - Manual Surf ALWAYS.
Think about it. If you have to click to get to the next website to earn credits, you are going to look at the websites and click your way from one to the other. You may even read the content of things that get your attention, sign up on a few mailing lists for information, etc.
Now, take your autosurf. You start up the autosurfing process and you don't have to click. Oh you may watch a few ads, then you say hey look, I don't even have to be at the computer and the ads keep coming in, and I'm earning credits. So the next thing you know you are not even sitting at the computer, your off watching Tv, letting the credits rack up, while no one watches.
Now if you think about that, autosurfing is really nothing but a waste of bandwidth. The website you are trying to promote is going to get the same kind of traffic as you are giving the exchange...useless. About the only one that profits is the owner of the autosurf exchange who sells the same useless traffic to unsuspecting entrepreneurs looking for a bargain. Of course most of these people will get what they paid for...empty hits with not much of an audience.
The Author Paul Erickson is the owner of a Free Traffic Exchange - TRAFFIC.ERICKSONS.NET.