Because with a new coin it's not as easy for them to accumulate as many coins.
Look at the price increase they achieved here. Made me a few BTC so I can't complain. I just hope they continue to pump dead shitcoins, because I've been collecting for ages. With that being said, I hope they choose wisely for their sake.
Well, they could have set up an ICO and move BTCs between their left and right pocket, making the acquiring costs as low as desired. I bet, there would be still a lot of people wanting to get themselves tricked by an ICO one more time.
Anyway, happy for your gain, but unfortunately such scams do not help to improve the picture of the altcoin scene in the long run.