The damage caused by DDoS attacks is, in principle, of a dual character. In addition to direct financial losses, which can easily be quantified and can vary from case to case depending on the length and intensity of the attack from several hundred thousand to hundreds of millions of crowns, your reputation will also very likely suffer.
Customers assume that the online service provider they use will pay maximum attention to the security of their network infrastructure. When access to service is severely compromised, they often go to the competition. Resistance against DDoS attacks in this regard seems an undisputed competitive advantage.