Dutch to English Marketing Advertising / Public Relations

A Dutch charity magazine is looking for suitable 'inhaakadvertenties'. I have already established from the context and a scan of the internet that these are ads that directly link in or refer to the theme of the charity. However, I have not been able to find a direct translation in English. I was thinking of using 'link-in advertisement', but does anyone have familiarity with advertising/marketing jargon and know the current term?