I would like to see a company test using Bitcoin/Lightning as a rewards program. Some regulatory hurdles and accounting hurdles with this though but I think it would be worth it. Feasibly the company could give a lot less rewards in sats and customers will still be happy. Personally I would rather have .5% back in sats than 2% in fiat rewards.
Maybe once the strike/ncr/blackhawk integration gets rolling this is a feature Jack can work on.
Would even like to see this tested on a small scale. Maybe find a local business with no rewards program and get them to try it out for 6 months and see if it improves loyalty.