A seat buyback plan is interesting.  That would be a unique feature with some benefits down the road.  What I don't like about that option, is it takes the decision to reinvest out of the seat owner's hands and forces it to a small extent.  I'm leaning towards thinking it should be paid back to miners via some sort of unique and fun process.  That way, people are encouraged to mine with us even if they aren't in a position to be acquiring more and more seats.  The 2.1% fee is already helping the seat owners, so I say we create a new and exciting way to let miners in on some Nasty fun to encourage pool growth.  The more fun miners are having, the more that 2.1% will help NastyFans.  More thoughts on this subject are certainly welcome.