Hi Would it improve my ranking if I hide affiliate links? If yes - how? And is Google considering it to be black hat?
I am unsure how you would hide the affiliate links and if you did, how would anyone see them and what benefit would they then have for you?
They are not completely hidden. Apparently someone makes a link to a page which redirect to the affiliatelink and when state in the robots.txt that the page should not be indexed
I don't think it really matters. You can use the "No Follow" attribute to block those affiliate links receiving page rank from your site. If you try to hide them it won't work as google is sophisticated enough to spot a hidden affiliate link. I suppose the only benefit is to hide them or mask them from visitors
Use no follow its better for example <a href="http://www.dpbolvw.net/click-3900000-10000649" target="_top" rel="nofollow" > Use no follow on all affiliate links
It's not blackhat to use a redirect on your site. Many people use javascript to do this, as well as a PHP redirect, depending on the method desired. Just the same, you could use a url shortening service, like tinyurl, to do the hiding.