Hi
I`m sorry but I`m not sure you know what Incapsula does.
CDN is just something that we use, not what we are.
Our true goal is to provide affordable security.
The CDN reverse proxy is only a delivery platform which allows us to monitor traffic and prevent threats on 'edge' - before they hit client's site/server .
At the same time, we use Cloud to integrate such solutions as: Bot profiling, Web Application Firewall, Backdoor detection and recently even 2FA service - which you can deploy on any part of your site, without any coding or DB tinkering.
Best of all - because we deliver via Cloud - we can provide all of these for an 'economy of scale' costs, offering enterprise-grade solutions for mid-market prices.
The CDN related acceleration benefits are almost a "bonus".
Still, even in that respect, we offer unique dynamic caching algorithms and optimization features, which are used to significantly augment our hardware solutions.
Finally, we have +350Gbps capacity for DDoS attacks, which we use in combination with other security services (i.e. our scrubbing algorithms)...
Consider how much it would cost to setup/manage a network like that.
Assuming this is even possible.
Having said all that, if you are a company with Global presence, managing 15 multi-gig pops on 4 different continents is probably not as cost-effective as 3rd party managed service, which will also cover failover, load balancing, etc.