This is the most useful way to catch unique visitors to your site for free.These visitors are more valuable than the autosurf visitors.Here each site will recieve a real click from the members of a manualsurf site until the next site.So these site (included yours) will be in the given manualsurf database but these won't be rotated automatically as the autosurf did.These site will be shown only if somebody reach it.But you don't have to wait years to get these hits because a loads of member do this at same time.Oups.The time.Yes this is a big question.Unfortunately gathering manualsurf credits so much time although it could be less.it mainly depends which  site you have joined.So if you can use more of them at same time and you save time ! In general If you have PaidToPromote link you can promote these on manualsurf sites too.

How simply do the manualsurf sites work ?

Mostly like the autosurf sites do.