It's a business transaction, sure. But the social interaction, while to us seems like sarcastic exaggerating, is humorous complimenting. In order to do that, it has to be language you can use frequently and honestly.
This is doing wonders for his mental health, likely because part of his thoughts are "what could I say to make ME feel more complimented than that." He's actively using positive self talk unconsciously.
There it is, the negative sarcastic tone I'm used to on the internet. I got a weird warm feeling reading all that stuff in front of your comment. Thank you for putting me down to reality again. Well done, sir.
Eh, I can understand your outlook when it's something done specifically to post it to the internet, like when people film themselves giving money to the homeless, but the guy pretty clearly looks happy to have his pistachios; I'd imagine the story is real, and this guy just wanted to share it, even if there was a less altruistic undertone of getting positive attention online.
And at the end of the day, there's a net good to doing things like giving people gifts and giving homeless people some money to help them out, even if done entirely for the sake of internet popularity. I like to focus more on whether the person being helped is thankful for it, and if they are, I just focus on that rather than the guy trying to make himself look good for doing it.