struts-templates -vs- jsp:include

The docs say... The functionality provided by these [template] tags is similar to what can be achieved using standard JSP include directive, but are dynamic rather than static. What dynamic aspect do I get with struts templates that I do not get with jsp:include? Based on the example

What commercial software uses Struts?

I'd like to know what commercial software vendors are using Struts internally in their products. Anyone know? Thanks, Craig