I think the advantage of Middlecoin is that the man behind the curtains is applying (or, at least, can apply as needed) more than an algorithm to make mining and exchange decisions, as evidenced by the recent dogecoin expedition. No one predicted it would be such an explosion, and while middlecoin hashed away at doge, other pools were rushing to add it.
What is your opinion on selling coins on ebay ?
Curious on this myself. It seems to be high risk / high reward.