I think that success on Trulia has a lot to do with location. I can't figure it out, either. I've read complaints here before, but I've had NOTHING but luck with Trulia, both when I advertised on their lower tiered program, AND when I left and was not paying for ads.
Do you partake in the posting of blogging, answering questions, listings for sale, etc? In other words, are you active here and rank in your area? I also think this makes all the difference. One strategy does not work on Trulia. You need both the activity and possibly one of the monthly plans to create the 'perfect storm' for your biz.
I don't work for Trulia, they don't pay me, but I give credit where it's due. I save the term 'ripped off' when I refer to Realtor.com, but I am sure there are agents there that do very, very well and would tell me the opposite, too.
Boca Raton-Miami Beach, FL
p.s. I just searched for a PRO in Edmond, OK and did not see you come up on the rankings. Edmond does not look as busy as Southeast Florida to me, so I think you would get a HUGE bang out of becoming very active here on the boards, and trying to get your ranking to #1 in your town. Doesn't look like it would take much time or effort. Then try your subscription again.