With more than 1 billion photo-obsessed users, Instagram has become a trusted destination for marketers looking to get their products noticed. According to a recent study, though, people on the picture-sharing platform don’t trust ads that look like “ads.” Instead, they prefer promotional spots that seem like something that their friends would post. For instance, a brand like L’Oreal would likely get more attention with a selfie of an influencer applying makeup rather than a glamorous, magazine-like ad.