TTS works with Open Time, Balloted, and Posted Trips.
Any trip that is Posted is fair game for a straight pickup. Picking up a Balloted trip must comply with whatever the pilot who has the Balloted trip wants.
If you want to do a straight pickup in TTS, that trip must either already be in Open Time or Posted for drop. If a trip is open, but there is no shopping cart, that means the trip must first be washed through a TTS run.
Even though LiteSabre is dead, trips may still be posted through the HISEQ in DECS and can be picked up and traded independently of TTS with no restriction of open time limits.