hello, as example there is a portal site called siteexample.com, this site has a menu with a link to my site with a url like: 1 http://www.siteexample.com/out.php?trade=mywebsiteurl.com Code (markup): is this a backlink? 2 or must he link directly to mywebsiteurl.com without: http://www.siteexample.com/out.php?trade=? Code (markup): is number 1 a backlink? will google get me a high rank with first one? or must it be like number 2?
Nope, Google does not consider this a valid backlink. It is using a URL proxy like myspace does to pass on non-site links.
Yes, that is a true backlink. The one in figure one of your post will provide no SEO value, but may provide traffic from that site.
and if my site is a download site like download.com and i get a link back from a pr5 funny videos sites, will this help?
Incorrect, they would provide some weight SEO wise. You get more value\weight from related quality websites. I don't see how funny videos or porn is related to downloading software\programs, and neither will GoogleBot.