There was someone who did something similar with Tesco (UK Supermarket) Clubcard Points (a reward system which, I believe, essentially returns essentially 1% of your supermarket shopping spend in return for correlating shopping data with your demographics !)
In the early days (1997) of the system, there was a 'bonus' points points offer on Bananas, sufficient that the cost of the bananas was offset by the rewards. Although searching for the article, the benefit was only 8%, and the total reward was only about 25 GBP (about 40 USD at 1997 exchange rates)
In the early days (1997) of the system, there was a 'bonus' points points offer on Bananas, sufficient that the cost of the bananas was offset by the rewards. Although searching for the article, the benefit was only 8%, and the total reward was only about 25 GBP (about 40 USD at 1997 exchange rates)
https://www.independent.co.uk/news/banana-economics-buy-942l...