(EN) Melissa Castellanos, 'Green Google Alternative' Ecosia: Founder Christian Kroll on the Green Search Engine that Could, su Latin Post - Latin news, immigration, politics, culture, 29 novembre 2013. URL consultato il 3 novembre 2021.
«When I started this whole thing, I started working with Google, but then they came up with the guideline that said they didn't want to with partner with charitable search engines, which was a bit unfortunate because we were counted as a charitable search engine [...] Their reasoning is that people could click on advertisements because they want to support the cause - and this would lead to additional spending for the advertisers.»