We have so much trouble, and waste so much time, with affiliate hotel-reservation scams that we have an additional guideline for such sites: look around it for 60 seconds, for demonstrably unique content. If you don't find it, reject.
Assuming your site has any unique content (which I wouldn't), the only approach would be to make sure that unique content was prominently featured in the site navigation, and that NON-unique content was labelled as such. If you label the non-unique content, we can ignore it and just review the unique content. If you don't, we're likely to look at the non-unique content, see that it is non-unique, and assume the rest of the site is that way.
60 seconds. And that may be on a slow line. Your navigation must be good, and your unique content must be obviously so. After all, how long are real users going to waste on a site if they've already looked at "other similar listed sites"?
There are no political criteria. These are information-theoretic criteria. Information is the key. Submitting a site where there are "several similar sites already listed" is the wrong approach--wasting your time and ours. Submitting a site for which there are NO similar sites is helpful for all of us.