read a couple of these pages, you will find some interesting stuff.
but after all i agree that MMM might have had an effect on bitcoin price but the question is by how much?
anything can have an effect on bitcoin price, anything that causes more people to buy bitcoin. but the effect is sometimes big like silk road and sometimes not. i think MMM's effect is not that big that can create any sort of concern.
Just analyze how many people participating MMM and make a good calculation. If we btc community that uses bitcoin for legal things has population of 50 million. MMM has a participants of 25m. How did I get the conclusion? Read the previous pages and see how many branches MMM had.