Suggestion for 'Open Guest List' feature

Hey guys. Got a quick suggestion for the open guest list feature. We create a bunch of invites for our church events, but sometimes we'd prefer to send a custom email invitation that simply includes our Crush3r invite link for people to click on to sign up. We also link to Crush3r via our website and newsletters so people can sign up on their own without an invitation.

I'm glad you guys have the option for an open guest list, but a lot of times people get to the site and don't know how to RSVP because they miss the "Add yourself to this open guest list?" link. Can we make that a little more user friendly? Even just bringing the content of the pop-up that's displayed when you click that link to the main event page would help considerably I think. Or even a more prominent button that says "Click here to sign up" would do the trick.