You didn't miss anything special, except that such huge income from NMC will get lower by time, because

a) NMC difficulty is climbing up
b) When more users on pool claim their NMC address, your share on NMC will be lower. Currently only 1/3 of pool members have filled NMC wallet, so your income is something like 3x higher than it should be thanks to your hashrate.

But yes, so far it's pretty nice boost :-)