[Demiurge]

Is it worth it if you have a US specific website that doesn't get that many users (~3 sessions at once)?

Also, another website I administer has a lot of user uploaded content that's constantly changing. I've not dealt with a CDN before, so I don't know how CDN helps with that? I think only a fraction of the data is static in this case.

PS Why the hell would someone downmod my honest question?

[numbsafari]

Not sure about the down mod, but I think the point of the OP is to address projects that have the goal of driving a "startup" business.

In addition, with mobile, getting rid of any network latency you can is going to help.

In general, though, I think you are right to ask the fundamental question. That said, it's something a lot of people end up needing anyway and it helps if you design for it up front.

tl;dr - If you're building a low-volume site, the OP probably doesn't apply to you.

[Demiurge]

That makes sense, thanks :)