Curious as to what your math was? The 40 and 50k might make sense with the DSG service, but the first 30 is just oil changes, rotations and a brake fluid flush at 30k right? I'm way under the cost of the VW Care plan with just that stuff.
And one cabin filter. That's what, about $400 a year ago? I paid about $279. I bought from an out-of-state dealer so no sales taxes.
You make out better if you have an R, since you also get a Haldex oil change.
I talked to the service manager about it. Unless he's blowing smoke he said if the mechanic does everything on the list they lose money. I have to believe him. Checking all the little things on the list takes time. Rotations take a lot of time too. And the dealer threw in a new drain plug.
In my case they did better, because I had them do only the oil change/filter/drain plug and nothing else. I check everything else myself and their wheel equipment is old and I didn't want my wheels scratched.
If my cabin filter gets stinky before 2 years I'll replace it myself. The dealer said they will just hand me the new one for later. They last a long time if you keep them indoors in an air conditioned room.
Figure out how much your dealer charges for the services and take it from there. It was worth it for me.
As for extended warranties, I bought the Fidelity 7/70/0 deductible for $1550. Also from an out-of-state dealer. Every one I called in Florida wanted $2,500. I'm sure I'll need A/C work and who knows what else. A new compressor and receiver dryer costs that much. Every GTI I've owned also needed both cooling fans, door latches, horns, and hatch struts. That's another $2,500. Florida heat, humidity and rain are terrible on cars. And I garage my cars.