Well, I took 1MH as a test.
I did plan to invest more, but with current trend, it's a no-go for me.
Who knows.. maybe I'm wrong

before those heavy dropped prices, few months ago i ordered a 1mh contract for ~128 (!) , although it was converted to 1,5mh i am sure it wont ever roi.
just play with the payouts and reinvested them to buy new lifetime contracts... hope this tactic works an i can get near my invest...
with the new prices it seems to be much better - BUT only if payouts stay stable ...
well, at the beginning of july the 1st contract started, i received payouts around 0.0011xx for a while. after few days the contract was converted to 1,5MH due to new prices - i felt lucky but it didnt last very long.
the payouts were slowly dropping till now i get around 0.0006xx - further dropping...
next week i wanted to invest a "little" more, thought about 25mh scrypt and maybe a little sha256 for testing, but what the hell if the same sh** happens again ? confusing
btw, i bought my 1st contract for testing - thanks heaven i DID NOT invest more...