Always on scrubbing has a number of factors depending on the provider you use. All charge for clean traffic but some charge for number of netblocks&#x2F;ASNs, number of routers, number of attacks mitigated, etc. It can get extremely expensive depending on your traffic needs and all the other variables. Paying an extra $250,000+ year for 2 Gb&#x2F;s of traffic is extremely expensive to me.