Pilot and Flying J had a contract conflict with Good Sam and their RV fuel card (which is only good at Pilot / Flying-J), so that discount was removed or reduced. This discount may come back in the future when the good sam contract expires and TSD can try to renegotiate, but there's no way to tell.
These discounts are negotiated regularly and will come and go for various fuel stations. However, the card WILL still work at ALL of the truck stops. What we do is use the app to see if a station on our route has better discounts and we try to use it. Sometimes location and convenience trumps discounts, but we go for a discount when we can.