Before PBS the bottom 30% were reserves. Now just 10% which indicates how much they're saving on labor costs by assigning every trip during monthly preferencing leaving little for trading.

20-P-4-b If immediately prior to the first run of the trip-trading system the pay value of all Open Trips in a Category is less than one percent (1%) of the pay value of all Trips available for awarding in Monthly Schedule Preferencing for that Category, the Company shall allow enough Trip drops in that first run so that the pay value of those dropped Trips equal that difference (between one percent (1%) and the current Open Trips). The intent of this provision is to seed trip trading.

UPA says 1% of value of all trips seeded but even this has been applied to our disadvantage. You might notice that often that 1% isn't there. I went forward with this issue shortly after UPA was implemented when I asked scheduling for a drop regardless of reserve coverage because there was no 1% seeding. They refused. Union said that one-for-one trip trades count as a drop and that scheduling also lowers reserve mins and that counts towards the 1% because it could allow an equivalent trade/drop.