Sources used: 1. https://www.google.com/amp/s/blog.smile.io/is-positive-reinforcement-the-secret-to-customer-behaviour%3fhs_amp=true
2. https://techcrunch.com/2017/11/03/lazy-jars-app-makes-you-pay-for-not-exercising-enough/
3. https://bizfluent.com/info-12030739-operant-conditioning-vs-classical-conditioning-advertising.html#socialshare
4. https://www.howtostartaclothingcompany.com/operant-conditioning-apply-business/
