Dice investment comparisonTLDR "On the 1st of October 2014 we invested ฿1 in the house bank of the top 9 bitcoin gambling investments sites ... 13 months after .. we lost 32% of our investment"
So what you're saying is... if you give random sites your money (note: all three of those you listed that 'ran off' were less than trustworthy to begin with and were stupid gambles), you're probably going to lose it. Makes sense.
If you had done MP back 13 months ago, you'd be up over 110% right now (2.1 BTC+ would be your balance), with over 40% of that coming just from the past few months (since mid-December).