Hello I am not sure if this is the right place for this but when you buy traffic what percentage of that traffic would become repeat traffic ( and use you site ). Or are you buying traffic to increase the numbers for search engines. So that targeted traffic gets to your site. Peace Tom
There no way of knowing this. If people like your site a few of them might return. It depends a lot on the type site it is, the conten, etc.
The majority of paid traffic won't be targeted and this is fundamental to securing return visitors. People should be visiting your site because it interests them not because they are being pushed in your direction. In extreme cases the visitors you'll receive will just be bot traffic anyway, and these do nothing other than eat your bandwidth.
Like said above you cant know... but targetted traffic like adwords would have more of a chance than untargetted one
probably depends on niche. Forums, blogs and social tends to have many returned visitors. Some other websites which just provides information which visitors will look once and only once tends not to have visitors from bookmarks.