Protect Word Template from Pirating

In the VBA window, bring up your module to the front, then in the "Tools menu" select "Project properties". Here you can password protect your code from being viewed.

This is not 100% protection, but will keep most people out.

This won't protect your template from being copied and distributed, as is. But, say, if you "watermark" each copy in a visible way, then that may deter too abundant sharing.

Assuming it is not infringing on other existing templates, etc., and does not violate any MS IP.

the only way to keep "unauthorized" persons from using the template would be to render it unusable, which doesn't seem a very effective tactic viz you customers using it.