I don't realy get why payout are low, unexchanged btc of the pool is high , my payout ,like my unexchanged ,are both very low.
If you try to compare different address payout vs unexchanged you can't find a logic....I know thast's middlecoin....anyway that's strange..
h20 often attempts to manually trade the alt coins to get a little bit of a better price. Sometimes it works and payouts are above what you would get in a pool that strictly auto-switches. Sometimes it's not. Just a risk associated with the pool.
Payouts the last few days have been poor but there was a large sell off of unexchaged coins a few days which gave a very high payout (about 1.5x the usual payout). You'll need to average it out over the long-term. Just keep in mind the pool is growing at an insanely rapid rate (it's nearly tripled in size in the last month) and the more people mining alt coins and auto-switching, the less each coin can sell for.