As a consumer of posts who wants to occasionally read Quora on my phone's DDG browser, I just no longer bother to click the link. Ditto with Reddit unless I feel like fighting their popups. Logging in or downloading the apps? You've gotta be kidding. Nothing would be a bigger waste of time or storage on my phone. FB is obnoxious in that they only let you view one page w/o logging in, but I never had a FB account so I just ignore any links to them. I suspect a lot of other people as consumers - not privacy advocates or engineers - find these login/download walls annoying enough to drop engagement. Quora is particularly obnoxious and I've never had an account with them, but removing a few invisible divs in the dom editor usually lets me read what I need to.