DDOS attacks have become cheaper than one can think, just because of the era of DDOS-for-hire services. Almost 40% network-layered attacks among all that happen are backed by these botnets. These attacks are subscription based, just like any other typical service being offered online, and anybody can launch several DDoS attacks on their target for just a dozens of dollars each month. The real-world cost of an unmitigated attack is $40,000 per hour. A worst-case scenario entails losses of hundreds of thousandsif not millionsof dollars.”]
Source: https://securityaffairs.co/wordpress/37819/cyber-crime/cost-of-ddos-attacks.html