Now that we have Communities, how difficult do you think something like a tipping system would be to implement? Would it require a lot of time (days, weeks, months)?
One of the major advantages of Communities was that frontend development would be greatly simplified and so sped up quite significantly. So I'm really keen to see how easy and fast such ideas for user experience improvements can be implemented.
I really can't say. My assumption is that this would be easy, but sometimes things that seem easy are more complex than they look on the surface. Either way, hard or easy, I think it would be worth it.