PBS is great if you know how to work the system and are flexible. You also need to know what you are able to hold with your seniority. I was holding atleast 15 days off when I was in the bottom 5% of lineholders. My monthly line value was min guarantee but I didn't care. One month I did 2 4 days and a 5 day and I was about 5 from the bottom out of 200 line holders which was also 1 month before I was furloughed.
If you bid for stuff you can't hold you will get really really really bad trips.