I think there was once a question about "couldn't somebody scam the system?" and my response was "we're talking about something that has a value of $0.69 to $2.00. I'm not too worried about it. Maybe we can revisit this topic when it starts to become a problem."
The important thing is that if you have two days left of your piece of pie, and you give it to somebody, and they only get one day - that sounds like a problem we
should fix.
Another important thing: we are exploring the idea that a piece of pie be represented with a million specs of pie - so when there is just two days left, you have something like 0.02 pieces of pie left - and that's the most you can give away.