If you want to entice more people buy up into your themes consider creating a limited access thread that supports your "free" product. All your links from the Platform theme listing at WP lead to PlatformPro.
Although most forums do require registration, every level of your forum registration requires a payment. So for example if someone wanted to see how (and if) the "Callout" works, or they have implemented it in a test bed as I have and want to understand how to fix the issue there, there isn't even a place where they can read if the problem is resolved for those who did pay for your commercial products
In the case of Platform, your footer background is the page background which takes a bit to discover. Also, you have buried the CSS so it can't be edited from WP. Granted you list where it is in the stylesheet, but now even a quick change involves FTP.
You have some great concepts and after spending half a day exploring Platform, I am enticed. On the other hand, I ran into issues that commercial clients are focused (i.e. how "callout" is not working well).