Each weekly payout has variation because it is based on the amount of block rewards all the Community MNs have earned for previous week. These total block rewards are then divided by the number of active shares to produce the payout per share.
Here is some blockchain information for the last Community Node Payout for 5 September:
MN1 Payout (iYQmYLTngqQHeVQzf3nZdDSAYW1wMmD9qC) - 333.56552 IONs
MN2 Payout (iZiGkguV1JiFGCvyCKTPoWSikn5rDcT6Wg) - 563.65069251 IONs
MN3 Payout (iiTsA1KMktJgmddiij8kADiak3LKBZyjm2) - 368.0065525 IONs
MN4 Payout (iigQptDvFfiTgSiJz1qfJKqxrdzuyJ7jTR) - 540.501035 IONs
Total Payout - 1805.72380001 IONs
Daily Average Masternode Reward - 64.49013571464286 IONs @ 16 cents = $10.32 dollars
Minus 2% Pool Fee - 1769.6093240098 IONs by 1609 shares = 1.099819343697825 IONs per Share
Join the Ionomy today and start making a few coins to spend or put away for a rainy day!!!
Is there any rhyme or reason as to why certain masternodes stake more than others? i mean your recent statements about your secret "complex formula" along with this information about wide variation in how much a masternode will actually generate makes me think that your previous advice to buy the coins that you are dumping as part of your complex formula in order to start my own masternode was not the best advice.