"View any coupon of any type " permission for anonymous reduces the Score in acquia
The Acquia Insight tool (I am assuming you are referring to that score) is a tool that helps you find potential problems in your website and configuration. It is an automated tool that performs simple checks. It is a guide and a tool. Not exact science. (It could throw a false positive.)

However in my installation of Commerce Coupon 7.x-2.0-rc2, there is also the permission to Redeem any coupon (and the per type Redeem &lt;type&gt; coupons permission). And that works for anonymous user as well. Perhaps you should try that instead?