Because they still hold some tokens. Moreover the Sholom twins are not done with crypto. As it was stated -if I remember correctly- in the AMA they intented to make another tokensale.

So they basically keep the hopium-addicted guys like fallen alive to raise another tokensale and scam even more people. And beside the new token sale they still own MGO tokens what they want to dump.

I already asked that once. Is there any comprehensible evidence that they ever raised so much ETH/BTC for this project?

I doubt it. Look at these channels, how many people are active here? Lets take a factor of 10 there and we are 500-1000? And assume on average people donated 1000$ to get scammed by them its 500.000$ to 1.000.000?

There were so many fake tokensales in the past that never raised the amount they claimed. So as more tokens they have as more heavy their bags are

-speculation.