Hm theres one thing u could do and i think u were able to do so too.
You get alot of Money from people buying silk. So you should have enough money to buy a DDoS Protection which just Cost 299$/Month. And I think u guys get easily more then that. Btw i already bought silk for 50€ from u so thats almost 1/3.
Server Costs are around 300 - 400$ i guess. So why dont u just buy a DDoS protection which does not cost so much?
For Example :
And anyway its a good promotion for the server i think.
Greets Xerdion