I've added credit badges. The first badge is given for 1,000,000 total credit, the last badge is given for 1,000,000,000 total credit. I chose 1 million as an entry level because there are already 258 users above that value and their contribution is 97.2% of project's total credit. So if you've been active on the project, you should already have one of these badges.
Bronze stars: 1, 2, 5 million total credit
Silver stars: 10, 20, 50 million total credit
Gold stars: 100, 200, 500 million total credit
Big gold star: 1 billion total credit
https://sech.me/boinc/Amicable/forum_thread.php?id=60