The Top 100 lists the names of eBird participants and their participation statistics, including species totals and the total number of checklists submitted.
If you do not wish to have your name displayed, you can opt out. Just to My eBird and click "Preferences", located at the top of the page next to your username. Here you can opt out of the Top 100 and make other personalized settings for your eBird account.
If this box is checked, as shown here, your data will not show up in the Top 100.