What is the average payout for Auto BTC at 4.75 MHs? On the second day I got 0.011 BTC.
Then it has been around 0.006 BTC since. Profitability seems to diminish drastically!

That would mean around 300 days until break-even (with no less ROI per day)!!

Actually same thing happens with other coins also. Must keep observing before bumping in more hash power.
Which was something I was considering until profitability dropped. I never allocated Auto BTC less than 90%.

-W
The same behavior to me....I think has to do with the coin profitability/difficulty