It is because a website has many parts that can be attacked by many people. The dependencies you use might have bad code in them, the parts you coded yourself might have stupid logic… If they can’t find anything to attack, they will do DDOS and let’s hope then you are on cloudflare.
That is the thing about a good website, getting attacked by its competition (openly in this case), if there is nothing wrong then you have nothing to worry about. Freebitco.in had some backlog issue and the moment that started to happen other competitors started to talk about it and literally "come play with us instead" without any shame at all, they just want more customers and money, and they are doing what they are doing however they want.
This is why I think we should consider how to move forward with what we have, and that is why we are getting so many people attacking. Do you have any idea why they started just as thequin became silent? Because they knew that if thequin was here, he would respond them back and show their true colours.