:bulb: If only you had asked me 17 days ago :grinning:. I have been trying to find with :flashlight: where it is used for some time now. It seems.... surprise surprise... that nowhere :bangbang:. Thank you!

Just dumping the column `session_expires` and all code related to it would not change a bit about the site behavior. The participant object is just created from `session_token` [gittip/security/authentication.py#L49](https://github.com/gittip/www.gittip.com/blob/063d2d26b9abd6660321111ef5b2c221c88558cf/gittip/security/authentication.py#L49). Grepping for `expires` brings up only code related to writing it.