From my experience the exchanges typically like a sweetener, like we’ll add you to our exchange in return for XXXX? number of MaidSafeCoins. I think it would be pretty trivial to get added to the exchanges where the Mastercoin smart properties have been enabled, but I was never hugely convinced that was a worthwhile investment, even though the sums involved were never that great (normally a few hundred USD). I appreciate that increasing the number of exchanges carrying the coin would increase liquidity, but it would be great to hear if community members think we should be pushing for an increased number of listings? Please bear in mind our development position and as suggested above, that MaidSafeCoins are temporary.