We jumped on the decision to buy direct because of credit card rewards. The benefits of owning direct didn't close the price gap between resale and direct for us, but hitting a new card bonus definitely did. Otherwise we would would have purchased resale, which now is only a $500 benefit to Disney.
However, I don't doubt for a second they're looking into saving money on credit fees, but I think the change is probably going to be around paying dues with credit. The true cost of our contracts aren't the purchase price- it's dues. I can't imagine they're happy paying credit companies year after year like that.