“…There is a recent but vast literature that has sought to discuss these platforms, with an emphasis on specific services, such as WhatsApp (Bursztyn;Birnbaum, 2019), Telegram (Willaert et al, 2022;Santos;Saldaña;Tsyganova, 2021), and WeChat (Wu;Wall, 2019), among others. And although, among these three examples, Russian and Chinese private messaging services equally pose challenges for their respective contexts, it is WhatsApp, due to its enormous popularity, especially in non-Western countries such as Brazil and India, that has boosted public debate around issues such as the spread of fake news (Resende et al, 2019;Sacramento;Paiva, 2020), and increased distrust in democratic institutions (Piaia;Alves, 2020), political radicalization (Evangelista;Bruno, 2019), and dangerous speech (Saha et al, 2021;Matamoros-Fernández, 2020). In all these cases, there is a lot of discussion about strategies to limit the mass dissemination of certain contents and technical solutions to contain damage to democracy (Resende et al, 2019), but little or nothing has been discussed about the effects of environmental opacity on platform cultures, and values shared by users of these services, nor on the practical challenges for implementing democratic controls and monitoring these media.…”