Yeah. That's because all those features used to be separate applications, not tied to BBForum/Wikipedia engine. They're all complex, but they're also orthogonal to the platform, and their implementations are pretty much commodities.
The only value provided here is by integration with platform (particularly UX-wise). Which seems fine, except the only reason this is valuable in the first place, is because the platforms prevent everyone else from doing such integrations themselves.
Of course, these are addons to the platform. But the platform is still the same fundamental application as a forum. Nothing more.
Doesn't matter what the company calls themselves, it's a forum that people upload phone pics to and those photos/images are then displayed in an algorithmic form (used to be chronological with forums)... same as a forum!
Remember, Google is an advertising company but they'd consider themselves more of an engineering or search company... doesn't mean they're right!
Edit: Forgot to ask, how do Snapchat make their money? Is it all through advertising? It's a genuine question, I don't use it and have no idea! If it's all advertising revenue then they're an advertising company like Google and Facebook!
For people who love BBForums (like HN tbh), everything may seem “like a forum”. But that is very reductive and uninspired.
There are various features provided by Snapchat (camera, filters, games) and FB (marketplace, messenger) that nobody would ever compare to a BBForum/Wikipedia. They are inherently complex and valuable to the majority of their users.