WT.Social, also known as WikiTribune Social, is a microblogging and social networking service on which users contribute to “subwikis.” It was founded in October 2019 by Wikipedia cofounder Jimmy Wales as an alternative to Facebook and Twitter. The service contains no advertisements, and runs off of donations.
I joined that network a while ago. They say they will never sell your data and “our platform survives on the generosity of individual donors to ensure privacy is protected and your social space is ad-free.” Based on that it seems to be likey trade-free. However I spotted a trade on the register site where they say you need to be 13 years or older to register. Also they do collect some data about you when you register: https://wt.social/data-transparency – but I’d see these more like essential to run a social network.