They don't really offer explanations as to why they reject you (which I can understand given the amount of applications they get). But I do know, they prefer sites that are essentially blog that link out to products. For example if I had other pages on my site detailing how to decorate a child's room in a Space theme, and other things like that, then I might have been accepted. Plus I might have applied too early. Without driving a ton of traffic in reality they don't need my $200 a month I'd send their way.

And I think they just dislike "catalogue" sites. Mine was curated, which at least offers some value, but I can see people abusing this and essentially rebuilding Amazon and linking out to them. It would weaken their brand.