I know Air Wisconsin is not a major.
But any added 'daily' open time trip pays 150% Above scheduled monthly credit.
In a case recently, I flew with a senior F/O who, with vacation trip touching had 3 weeks off and only had a 4-day scheduled at approx. 20 hours. Monthly credit was 82ish.
-Had a 7 day cruise with the family. Picked up a 3-day, 2-day and a couple day-trips. Each additional trip paid 150% Monthly pay was close to 145 hours. Flew approximately 63 hours.
Not for everyone, but some creative ways to make some money...