yeah people arbitrarily throw content federation and identity federation into the same bin. you can get a lot of the squeeze of a centralized reddit-style serv

yeah people arbitrarily throw content federation and identity federation into the same bin. you can get a lot of the squeeze of a centralized reddit-style service (in terms of low-friction user signup) without needing actual content federation. One ID can still let you post on multiple boards without needing to sign up in 27 places, and that doesn't need content federation. It also significantly reduces the moderation problem because now you are letting {Google,Facebook,Apple} solve (or at least gate/significantly reduce) the spammers problem for you. That said, custom IDPs are inherently at odds with this value in spam filtering. If a spammer just needs to set up a custom domain, you don't get any signal as to user quality.