yes mate the main target of this group are those newbies who doesn't understand how the trade works, they both help the dev who doesn't know how to create good usable coins and those whales who have enough btc to invest and after the trust has been generated to those who use their service a big dump will happen and the dev and the newbie investors will cry out loud.
The main target is actually the people who buy during the pump, as majority of them are the people who end up losing. It acts like a ponzi for the pumpers. Its also bad for the dev irrespective if he is a good one or not, as the pump tends to involve enough money even for a decent altcoin to up in price and then down later. The manipulation simply causes people to lose money in the coin.