acosmin_freebies.zip not installing in WordPress

Hello,

I subscribed to your newsletter in order to receive the Twitter and Ads widgets, plus 10% discount on premium themes. I then received an email with a link to the file “acosmin_freebies.zip”. When trying to install it in WP here was the error message I received:

Unpacking the package…
Installing the plugin…
The package could not be installed. No valid plugins were found.
Plugin install failed.
Return to Plugins page

Any help would be greatly appreciated.

Thanks.