A friend on the mainland flies within Belize two or three times a week, every week of the year. He always flies Maya, yet several times this year they've left him standing when they've decided not to run a particular flight because they don't have enough passengers. On one occasion he was flying over to see me and had actually boarded the plane, when the instruction came to the pilot to stand down as someone in the office had just worked out that they were losing money on that flight. He'd already bought his ticket and they refused to refund him so he could catch the Tropic flight, but made him wait an hour till the next one.
No, you can save 30% or more paying cash with Maya, but it's risky.