You missed the best deal, which ended Thursday night. Intra-California quick turns under $70. Possibly as low as $60 using the $33 one-way fares. I guess you weren't subscribed to the email alerts thread in this forum.
I don't expect to see $29 fares again, but if they appear someone will post them.
In the past I have used these segment runs to reach 100 trips for Companion Pass, but this year I will be too far away from 100 for that tactic.