My stupid brain wondered at first why flower vending machines were relevant on Hacker News.
This is an art project but like and follower vending machines do exist on a commercial basis. Here's one I saw in St. Petersburg, Russia selling likes, along with print outs of photos from social media: https://imgur.com/a/zQVdS7c
The price was 100 likes for a 100 rubles, about $1.50 USD or so.