If ClickBank would agree to my terms then I think they would get themselves a MUCH better reputation and a hell of a lot more business from the rest of the industry. But, they refuse to, because the scammy ebooks they allow do in fact make them lots of money, and they also banned me and all of my credit cards because I told people to buy the scammy ebooks and refund them afterwards.
If someone would create a platform similar to ClickBank, with a few VERY necessary changes and rules, and make it much more robust, they would bank. Hard.
There is also a site like paydotcom, but one of the biggest scammers in the ebook industry runs it - aka Mike Filsaime (sp?) - and I've heard some pretty evil stories about what they do with the personal and business information they store on their affiliates, so technically, no, there is no REAL alternative at the moment. But there will be someday I'm sure.