Caveat, not an agent.
I think that is a secondary reason.
My guess is that the primary reason is money for everybody involved.
(And as I have stated before, I don't see the two GoodRx alternatives being promoted by FMO's as consumer friendly as either GoodRX or RXGO. But, I am not an agent and I don't see the vast range of meds your clients have to buy during the year.)
We were trying to promote GlicRx, but I'm not seeing that they are better than GoodRx. Should have done more research. Looking at RXGO right now though. I think they might just be the way to go. We'll see.