Assuming there is no script, it seems quite odd for an account to be posting every hour. It's just not normal behaviour. In Reddit, this would be classified as a bot for karma-farming.

Not only myself, but a lot of people find it strange for people to invest their energy and time and attention to be using a shared account to be reposting stuff hourly if not for karma-farming. And it seems to be doing this straight for days at a time, just based on the recent account history.