>If that problem arises, we can deal with it.

This problem has arised in nearly all the sites that I know that have ever tolerated it. Eventually, someone learns that it's allowed and exploits that. Actually, you're that person because that link sounded to me like a sales pitch, but I can't prove that this was your intention.

In all cases, I'd rather prevent it from happening by disapproving it than "dealing with it" after the deed is done.

>To the actual end user, it makes no difference at all.

Bullshiiiiit. It makes the difference that this shit gets spammed all over the Internet eventually. Boo.

(as a side note, you can't prove they'd have gone to Bezos rather than contribute to an Amazon commission decrease if no one used these referrals)