The FSS does not give you surface scan credits either, well not all of them. It gives more then an ADS scan but less then a DSS scan. To get the good credits, you still have to fly there to map the planet and to get the first mapped by tag which really should be considered the most important one as it takes more effort and gives more cash. The first discovered by tags should really be considered the secondary tag, the not so important one, the one with the least kudos.
These days if I see someone that has mapped a planet well over 100,000ls away, I take my hat off to them and say well done.