Plugins (mods/hacks) With Style?

Do you include forum plugins with your custom styles?

If so, do you credit the plugin creators? How/Where?

 

Like the Credits of the mod or the style?

 

As an example, would you keep credits for any mods that the style you created are dependent on?

Most paid mods have credits mandatory or a branding-free option. But what about the smaller, free mods that don't post any credits on your site, and you then include those in your template package (heck, I don't even know if people do THAT), would you include credits to the creator of those mods, either in your forum or in a readme or license file?

 

I'd leave them alone, they earn the credit on the forum.
Or wherever the CopyRight is located.