Uh... at the risk of repeating myself... are you sure you're reading the right pricing chart?

According to SimpleCDN's website, their S3+ service is not a content deliver network. It has US and EU locations, just like S3. So sure, it's cheaper than S3, but the thing they offer that competes with CloudPoint is potentially bit more expensive than CloudPoint, depending on the disposition of your content.

And I think you missed the part where you don't get charged for moving things around between S3 and CloudPoint. And the part where you can set your caching however you like, just like you would for any file you serve from a traditional webserver.