You would describe this as being different from competitive?
I doubt any amount of money would matter if we had 1 representative per 30k people as written in the constitution, NY State is about 20 M people so you'd need to bribe ~300 of the ~600 representatives in order to get your way (and also do that for every other state).
They don't have to care about actually representing anyone. They can skip town halls, ignore requests, etc. Primaries are a very weak form of influence.
If you want numbers, reps in competitive districts hold more town hall meetings. And they also hold more personal staff (limited back in 1975) in their home states. This is kinda a no-brainer. If you have to care about re-elections, you'll try to help your local consituents.