You are a silly person. Stop trolling the threads.
How do you know they lost money? your calculations are completely wrong..
there is roi..
http://mining.thegenesisblock.com/a/ded3f84bb6And how long do you calculate the big percentage increase to stay? let people do their own calculations and investments.
Just because you didnt get your blade sold for 13BTC, doesnt mean you need to pester and ruin business for everyone else.