Hi Kristian,
The Youzer is causing a lot of issue on your site. Try loading it over a slow connection to see it.

As of the text, It is line-height that you need to set.

Something like this

.widget-content.invite-anyone p {
    line-height: 1.5em;
}

May do the trick.
PS:- Invite anyone is not my plugin. It is Boone’s

Regards
Brajesh