Saying "we have a crypto strategy" to both investors and the board

Well you can't really tip with a payment system, realistically, right? If I want to toss someone 50 cents Visa or whoever takes a fixed amount plus a percentage, so there are usually minimums.

stuff like the lightning network has similar fees right? I can see the benefit for the smaller scale of tips though

Lightning transfers cost 1 sat, about 0.05 cents. So on a 50 cent transaction that's 0.1% fee.