Every product there is on Clickbank, be it e-book or a video, is hackable. I know it because I've seen hacked links posted on a daily basis, all from Clickbank. The problem is because Clickbank sellers have one unique download page for all customers and once the download link gets leaked, anyone can get the product. How to prevent this, how to secure your product?
What a load of crap, every product on clickbank is not hackable. There are numerous download scripts that can easily take care of this problem as long as the vendor is not a cheap ass.
It's not hackable. It's just the way things are, they're just simple. For most products, after you buy you're forwarded to a regular html page on the website. It's not like anyone has to hack to get it.
Not everything is hackable if you make it right. Even if someone gives out my download page, it cannot be accessed without a valid receipt. Regarding to direct access to the eBook, you can be sure it is not stored on the root directory. Be smart. It doesn't take too much thinking beyond some simple PHP commands. nadavs