Earlier quoted context omitted.
> don't overburden our servers Does this effectively mean DDoS protection that's free until you actually use it?
Thats basically for everything. Do you think home insurance will pay if you burn down house every year. Or car insurance if you trash it few times a year. I see DDOS protection as kind of insurance for event happening once in a while, if it happens all the time one definitely needs something more than a free service.
Warning: Insurance is not going to pay if YOU burn down your home /// even a little bit ///!!!