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New study finds bots and fraud farms responsible for 73% of web traffic
(interestingengineering.com)
This is a most excellent place for technology news and articles.
TamperMonkey (I've been told to use ViolentMonkey instead as TamperMonkey isn't open source) and the script here. Then you can run a script to periodically log into your account in a headless browser and click the button. Unfortunately there's no coupon API so this is the best solution I could think of.