It is assumed that if you sign into BTCJam using TOR that the "Tor Onion" logo will show next to your loan. And that is the case, IF you sign out. Staying signed in and never signing out prevents that icon from showing.
Just one of the many flaws of this site that are clearly being abused....
The login expires in 6 hours.
Can you please describe the other "many flaws" that are being abused?