Call my cynical if you like.    But..... I still find it curious that 6 Months ago 50 miners representing around half the network appeared out of nowhere and have now moved on from ninja to an anonymous pool.

As they are so dominant it would be nice for their background and objectives to be made clear as opposed to your rather thin "explanation" of them being "a large group of miners"

BTW I actually quite liked the option of Mining with them as it made for a very steady and predictable income, as opposed to the variance that one faces on a Pool winning very few blocks.

Rich