Yeah I've see the amount DLC they release and I have heard that alot of times fundamental fixes for their games are only available if you cop the DLC. Problem is Firaxis with the CIV franchise is not really any better in that regard. Civ V was guilty of the DLC spam. A good number of the post release CIV VI civs and scenarios are DLC like the Nubian civ. Good thing I have the Deluxe edition this time.
While this is true, the DLC for Civ is pretty cheap and not really much of a necessity unless you want more civs, scenarios, and maps. Meanwhile, Paradox's DLC is wild expensive. Thank God for steam sales because yeesh.