Can I Sell Niche Wordpress Themes in Codecanyon

I was wondering if I can sell very niche wordpress themes in the codecanyon market place (not themeforest) I’m thinking of building an amazon theme that pulls products from there api (not a plugin),the reason why I’m thinking to sell in codecanyon is because of its very niche nature and the direct use of the api, which is what I want to use in the theme.

I have seen niche themes like this on themeforest. Themes that consist mostly of programming, like learning centres or help/support systems. Themeforest would be the way to go for a “theme”.

Then just create a “plugin” with similar features and list it on codecanyon. Then you can cross-sell between markets ( e.g. “This plugin is available as an installable WordPress theme on ThemeForest, click here”. )

Sounds like a plan! Thanks.