Sound astonishingly similar to my phone.
Regardless, the free trial -> paid version is a popular model, even if 1 year is a long "trial"
I paid a few dollars for WhatsApp once or twice to keep it working after the first year. It was such a small amount I didn't care. I remember some of my friends freaking out about it though, like they were being tricked.
I agree for the most part though. Some uses just flat out refuse to pay money for apps, even $1.
Your idea would be similar to healthy meals that take 4 minutes to prepare to combat fast food chains: a big reason why McDonald's is as large as it is, is because of the speed of it.
And of course to the last point: anything would be insanely profitable if a billion people pay a dollar per month for it.
Plain old phone calls
SMS
.
I haven't had an FB account in over 8 years, but I rue to this day the fact that 'most' people 'mostly' rely upon it for their communication. Doesn't matter what i believe or what I use, it matters what everyone else 'mostly' uses.
Pretty much everyone who has a facebook has a phone, so I can communicate just fine with Facebook users
I don't myself agree with it - I'm in your camp, thinking there're far better existant tools out there. I just know from my own experience I'm 'missing out' on stuff shared or put in there by people locked into a domain I do not myself have access to.
People like(d) FB because it was trivial to look up and stalk old friends. The "what are they doing now" effect is powerful as it the "look at me now" effect.
Like, if you really wanted to, you could reconnect through mutual acquaintances. I mean you went to the same high school, right? All FB does is make it so low effort that you can therefore "reconnect" (does mutual Facebook wall stalking really count as human connection though?) with people yoy previously could have found if you really wanted to, but were not worth the effort
What you're listing sounds very similar to... email or one of the many instant messaging platforms.
You can use mailing lists, though those impose a bit of additional friction in several dynamics.
There's also the matter of format conventions and client rendering, which can be quite significant particularly across various schools / application models: Usenet / Unix style top quoting, ccmail, LotusMail, or Exchange quote & reply styles.