[Baeocystin]

I realize that this is a hard thing to 'prove', but I am personally certain that the amount and quality of such things has dropped significantly from a decade ago.

Not to zero. You can still find things tucked away in a post on reddit or the like. Almost never, as far as I have experienced, on Facebook or its ilk, as the affordances are different. I genuinely think there has been a loss.

[salawat]

It used to have positive utility, as before you were acquainting with people you would literally have had nil chance of acquainting with before.

Now?

Nope. Putting anything out there is basically just doing the rest of the world's Open Source Intel for them. Maybe it isn't the Net that changed. It's just there's way more sharks out there that can't just leave well enough alone.