Question: how will you allow your buyers to upgrade with new versions of the plugin for any of these 'premium' sliders - as a buyer cannot download when there is an update and this could cause their sliders to stop working in the future if something breaks due to a jQuery update or WP update etc.
Just curious as this is why I do not include any plugins from CC.
You think so? Mmmm... maybe you are right, but those plugins are pretty awesome and much famous, so if they are included in some theme, i think that theme will have more sales than without that plugin.
So you provide themes with jquery based slider with a backend options panel for that? I've already know how to do that, but i think that, for example, "revolution" is better that "flex" slider, you dont think so?
Maybe it's a confusing topic but i hope you will understand