@kq you are free to see it that way.
I see it as sadly the exact opposite of nonverbal communication in that they are strictly and only verbal, it is a single word (like or boost or whatevs) in the end. And a record remains of the incident. not true in nonverbal.
And there is not as much a communication as there is a tally.
No one is having non-verbal communication with more than, say, a few people at a time, occasionally, never mind hundreds of people, hundreds of times a day.
It would be cool to build what you are describing, its just that no one has.
If I left the pub at the end of the evening and looked at my receipt for the drinks, and also saw that I had five nods, four winks, three pats on the back, and one hearty guffaw; I’d ask myself, What the fuck am I doing reading this receipt?