MilesBuzz! - Mileage Accrual

I wonder if any FFP allow mileage accrual with Barter agreement tickets. I bought one and after complete my travel I found that I didn't get mileage on that trip.

Chances are if you bought a ticket off somebody, you most likely bought an award ticket which wouldn't be eligible for mileage accrual on any airlines frequent flyer program. There are plenty of Southwest Rapid Rewards along with those "Fly 3 Fly Free" certificates that people are selling, and those wouldn't be eligible for any mileage/point accural.