I assume only when dealing with trusted providers. Looks like there are sites where you can run a test and see if your proxy is okay, but I prefer just to work with proxies from the same provider. I need it for social networks https://themazatlanpost.com/2025/05/26/new-content-formats-in-social-media-stories-shorts-streams/. To upload my content fast and good, and to promote other profiles. Time goes on, and promotion through social networks is still very relevant.