Why are you so critical of them ?
It is possible to pump the price of the chosen altcoin by a coordinated pr campaign, fueled by fresh rumours. Not bragging here but my bullish article on litecoin published on the 1st of april at smartlab (russian analogue of seeking alpha) had more than thousand views and surely brought many new traders to btc-e. I am far from saying that this publication alone caused the price to explode, but it definitely helped to spread the awareness among speculators. Those who listened to my recommendation and acted fast could made a whooping 300% return on their investment in just 3 days !!!