Destructive habits as motivation

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For the last 6 months I have been running next experiment: I would not play video games or eat until I have worked/studied for 10 hours. For every 10 hours I have spent working I would play vidiya for an hour. So if I have worked for 15 hours on a given day I would treat myself with 1 hour and 30 minute session.
I log what I do everyday in an excel. I make a graph of how many hours I have spent on working and studying, how many hours I have spent while being detracted and so on. Also, I log my mood (depressed, normal or happy).
So after running this experiment for the last 6 months, I have gathered enough date to say that my productivity almost doubled and times which would usually spend on being unproductive has decrease by nearly 400%. My mood has become a lot better. I fell a lot less depressed on a daily basis and more often fell proud of how spend my day.
Before running this experiment I would avoid playing any vidiya at any cost. I usually would think that it kills motivation and drive for any achievement. But in reality, in my case, opposite has turned out to be true.
Have you ever heard of similar experiments in academia, not just anecdotal examples, of people being motivated by 'negative' habits (for example drug usage)?