> Instagram in particular seems to have gotten much more aggressive in not letting you view anything without an account. <…> Pretty much everything "big" is much much worse on the mobile web, I guess because they figure they stand a pretty good shot at getting you to get The App instead. It sucks.
Those are two separate issues. Almost all features of Instagram, except for interactive widgets in stories, are available from the web (doesn’t matter mobile or desktop). Like with Facebook, I chose to not install the actual app on my new phone, but I do fire up their web versions sometimes. Considering the extent of functionality, Instagram actually works really smoothly, and I hear the same about FB’s non-basic web version. Though yes, they do require an account.
Speaking of Twitter, it also works well from the web (albeit with no support for their equivalent of stories), but curiously they block VPNs (or perhaps just EC2 IP ranges) in a way that completely breaks some of the site (such as user profiles).