As an online entrepreneur I am curious as to why you dislike affiliates?
In Reddit's case, it means they have an incentive to silently promote posts and comments that have affiliate links because it makes them money.
If a review of a product has affiliate links then I'll immediately distrust the review because it's not possible for me to know whether they actually like the product or because they get paid if they convince people to like it.
In this case however, since the posters aren't putting them in there's no incentive.