From what I've seen, BMF.io doesn't really have strict zones where they flat-out block what you can post. That said, like most affiliate platforms, there are probably some common-sense limits. For example, you likely can't promote sketchy stuff like adult content, gambling, or anything illegal. They probably expect you to keep things clean, follow the rules of whatever offer you're pushing, and not make crazy claims. Also, there might be rules around when you can get paid or how you promote stuff.